Hi,
I'm writing a program using VB.NET that needs to communicate with a DOS
Pascal program than cannot be modified. The communication channel is through
some file databases, and I have a huge problem writing VB Double values to
the file so as the Pascal program can read them as Pascal Real values.
I've managed to find the algorithm to read the Pascal Real format and
convert it to a VB Double, but I cannot figure out the opposite algorithm.
Can someone help me reverse my algorithm and develop the function
"DoubleToReal (ByVal Data As Double) As String"
Here is the conversion from real to double:
Public Function RealToDouble(ByVal Data As String) As Double
Dim dMantissa As Double
Dim i As Integer
Dim j As Long
Dim k As Long
If Len(Data) <> 6 Then
'Err.Raise
'exception
Exit Function
End If
'accumulate the mantissa
dMantissa = 1
For i = 6 To 2 Step 1
For j = CType(IIf(i = 6, 6, 7), Long) To 0 Step 1
k = k + 1
If (Asc(Mid$(Data, i, 1)) And CType(2 ^ j, Long)) <> 0 Then
dMantissa = dMantissa + 2 ^ k
End If
Next j
Next i
'finally, assemble all the pieces into a number
If (Asc(Mid$(Data, 6, 1)) And &H80) = &H80 Then
RealToDouble = dMantissa * 2 ^ (Asc(Mid$(Data, 1, 1))  129)
Else
RealToDouble = dMantissa * 2 ^ (Asc(Mid$(Data, 1, 1))  129)
End If
Try
Return ([Decimal].Round(CDec(RealToDouble), 2))
Catch ex As Exception
'MsgBox("RealToDouble, Conversion error: " & Data & "; " &
RealToDouble.ToString, MsgBoxStyle.Critical)
Return 0
End Try
End Function
Thanks for your help
David 17 4286
I probably have not understood you correctly, but can you not simply convert
the double to a string an then truncate the string to the correct length?
As far as I am aware, a real number is simply a number which is not
imaginary, so I dont know how this differs in a Pascal Real number. Your
function seems to convert a string into a double but goes a long way around.
BTW, I actually tried to convert "1.2345" and it returned 0.0
I'm sure Im missing something here, can you illuminate ?
Regards  OHM
David Scemama wrote: Hi,
I'm writing a program using VB.NET that needs to communicate with a DOS Pascal program than cannot be modified. The communication channel is through some file databases, and I have a huge problem writing VB Double values to the file so as the Pascal program can read them as Pascal Real values.
I've managed to find the algorithm to read the Pascal Real format and convert it to a VB Double, but I cannot figure out the opposite algorithm.
Can someone help me reverse my algorithm and develop the function "DoubleToReal (ByVal Data As Double) As String"
Here is the conversion from real to double:
Public Function RealToDouble(ByVal Data As String) As Double Dim dMantissa As Double Dim i As Integer Dim j As Long Dim k As Long
If Len(Data) <> 6 Then 'Err.Raise 'exception Exit Function End If
'accumulate the mantissa dMantissa = 1 For i = 6 To 2 Step 1 For j = CType(IIf(i = 6, 6, 7), Long) To 0 Step 1 k = k + 1 If (Asc(Mid$(Data, i, 1)) And CType(2 ^ j, Long)) <> 0 Then dMantissa = dMantissa + 2 ^ k End If Next j Next i
'finally, assemble all the pieces into a number If (Asc(Mid$(Data, 6, 1)) And &H80) = &H80 Then RealToDouble = dMantissa * 2 ^ (Asc(Mid$(Data, 1, 1))  129) Else RealToDouble = dMantissa * 2 ^ (Asc(Mid$(Data, 1, 1))  129) End If
Try Return ([Decimal].Round(CDec(RealToDouble), 2)) Catch ex As Exception 'MsgBox("RealToDouble, Conversion error: " & Data & "; " & RealToDouble.ToString, MsgBoxStyle.Critical) Return 0 End Try
End Function
Thanks for your help David
Hi OHM
Can you take a look at that answer from cc I have sended in and give some
comments.
All is there just paste it on a new form and run.
Or I don't understand it (and no user will understand it) or it is a real
big bug.
Cor
I think my reader must be out of sync here. I dont see this reply. I have
noticed this with quite a few posts lately. Can you repost under this one
please.
Thanks  OHM
Cor wrote: Hi OHM
Can you take a look at that answer from cc I have sended in and give some comments.
All is there just paste it on a new form and run.
Or I don't understand it (and no user will understand it) or it is a real big bug.
Cor
Hi OHM this was a question from cc how do I make keyboard & mouse temporary not response to desktop
I did want to answer with simple" me.enabled = false", but did not trust it
because this answer seems to simple to me. So I did test it, and I find
this strange and do not understand it.
Who will test it also and tell me if this is normal behaviour or a bug?
The problem is that when you pusth the button when enabled is false, it
keeps responding to the events, so you have to push several times on the not
locked button.
Framework 1.1
Cor
\\\
' needs one button and one label on a form
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
Static i As Integer
Me.Button1.Text = "locked"
Dim ctr As Control
' Me.Enabled = false did not work so
'I did try this but does not work either
For Each ctr In Me.Controls
ctr.Enabled = False
Next
Me.Refresh()
Dim y As Integer
For y = 1 To 20
Threading.Thread.Sleep(50)
i = i + 50
Me.Label1.Text = i.ToString
Me.Refresh()
Next
For Each ctr In Me.Controls
ctr.Enabled = True
Next
Me.Button1.Text = "Unlocked"
End Sub
///
But this post is about Mouse and keyboard, the current thread we are in is
regarding Double/Pascal Real number conversions?
Whats happening, am I going mad ?
Regards OHM
Cor wrote: Hi OHM this was a question from cc
how do I make keyboard & mouse temporary not response to desktop
I did want to answer with simple" me.enabled = false", but did not trust it because this answer seems to simple to me. So I did test it, and I find this strange and do not understand it.
Who will test it also and tell me if this is normal behaviour or a bug? The problem is that when you pusth the button when enabled is false, it keeps responding to the events, so you have to push several times on the not locked button.
Framework 1.1
Cor
\\\ ' needs one button and one label on a form Private Sub Button1_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button1.Click Static i As Integer Me.Button1.Text = "locked" Dim ctr As Control ' Me.Enabled = false did not work so 'I did try this but does not work either For Each ctr In Me.Controls ctr.Enabled = False Next Me.Refresh() Dim y As Integer For y = 1 To 20 Threading.Thread.Sleep(50) i = i + 50 Me.Label1.Text = i.ToString Me.Refresh() Next For Each ctr In Me.Controls ctr.Enabled = True Next Me.Button1.Text = "Unlocked" End Sub ///
Hi OHM
No I asket you to look to a posible Bug I had posted.
I was curious if I became crazy or it was a bug.
Cor
The Pascal Real type, is stored on 6 bytes with a very special coding. When
you write a real value in a file, 6 bytes are written to represent the value
(obviously, no language writes the string representation of the real !). My
function reads the 6 bytes and convert them to a VB double.
I need the reverse function !
David
"One Handed Man" <Bo****@Duck.net> wrote in message
news:bp**********@titan.btinternet.com... I probably have not understood you correctly, but can you not simply
convert the double to a string an then truncate the string to the correct length?
As far as I am aware, a real number is simply a number which is not imaginary, so I dont know how this differs in a Pascal Real number. Your function seems to convert a string into a double but goes a long way
around. BTW, I actually tried to convert "1.2345" and it returned 0.0
I'm sure Im missing something here, can you illuminate ?
Regards  OHM
David Scemama wrote: Hi,
I'm writing a program using VB.NET that needs to communicate with a DOS Pascal program than cannot be modified. The communication channel is through some file databases, and I have a huge problem writing VB Double values to the file so as the Pascal program can read them as Pascal Real values.
I've managed to find the algorithm to read the Pascal Real format and convert it to a VB Double, but I cannot figure out the opposite algorithm.
Can someone help me reverse my algorithm and develop the function "DoubleToReal (ByVal Data As Double) As String"
Here is the conversion from real to double:
Public Function RealToDouble(ByVal Data As String) As Double Dim dMantissa As Double Dim i As Integer Dim j As Long Dim k As Long
If Len(Data) <> 6 Then 'Err.Raise 'exception Exit Function End If
'accumulate the mantissa dMantissa = 1 For i = 6 To 2 Step 1 For j = CType(IIf(i = 6, 6, 7), Long) To 0 Step 1 k = k + 1 If (Asc(Mid$(Data, i, 1)) And CType(2 ^ j, Long)) <> 0 Then dMantissa = dMantissa + 2 ^ k End If Next j Next i
'finally, assemble all the pieces into a number If (Asc(Mid$(Data, 6, 1)) And &H80) = &H80 Then RealToDouble = dMantissa * 2 ^ (Asc(Mid$(Data, 1, 1))  129) Else RealToDouble = dMantissa * 2 ^ (Asc(Mid$(Data, 1, 1))  129) End If
Try Return ([Decimal].Round(CDec(RealToDouble), 2)) Catch ex As Exception 'MsgBox("RealToDouble, Conversion error: " & Data & "; " & RealToDouble.ToString, MsgBoxStyle.Critical) Return 0 End Try
End Function
Thanks for your help David
This may be because the message goes out in the message queue, the button
does not respond to it until the loop finishes, then it processes the click
( I think ).
Regards  OHM
Cor wrote: Hi OHM this was a question from cc
how do I make keyboard & mouse temporary not response to desktop
I did want to answer with simple" me.enabled = false", but did not trust it because this answer seems to simple to me. So I did test it, and I find this strange and do not understand it.
Who will test it also and tell me if this is normal behaviour or a bug? The problem is that when you pusth the button when enabled is false, it keeps responding to the events, so you have to push several times on the not locked button.
Framework 1.1
Cor
\\\ ' needs one button and one label on a form Private Sub Button1_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button1.Click Static i As Integer Me.Button1.Text = "locked" Dim ctr As Control ' Me.Enabled = false did not work so 'I did try this but does not work either For Each ctr In Me.Controls ctr.Enabled = False Next Me.Refresh() Dim y As Integer For y = 1 To 20 Threading.Thread.Sleep(50) i = i + 50 Me.Label1.Text = i.ToString Me.Refresh() Next For Each ctr In Me.Controls ctr.Enabled = True Next Me.Button1.Text = "Unlocked" End Sub ///
I dont know the answer to this. I suggest you post the following this
specific question at top level in the group:
Regards  OHM
Cor wrote: But should it do that?
Hi David,
I think this is a much to dificult approach for a newsgroup.
Maybe if guys like Fergus Cooney where here now, he could help you because
he likes this.
But he is not and I don't know if he will return soon.
Every byte in a file is representent by a hex value.
Can you not represent the bytes in hex form representing a normal decimal
value, maybe somebody can help you than.
Probably not me, because mostly this is not my stuff, but you never know.
Cor
Hi OHM,
Putted it in the vb.language.controls group.
Almost the private group from Herfied, I am curious what happens.
:))
Cor
The exact representation of the Pascal Real type is:
Sign Significand Exponent
Width (bits) 1 39 8
David
"David Scemama" <da***********@nospam.wanadoo.fr> wrote in message
news:eF**************@TK2MSFTNGP12.phx.gbl... The Pascal Real type, is stored on 6 bytes with a very special coding.
When you write a real value in a file, 6 bytes are written to represent the
value (obviously, no language writes the string representation of the real !).
My function reads the 6 bytes and convert them to a VB double.
I need the reverse function !
David
"One Handed Man" <Bo****@Duck.net> wrote in message news:bp**********@titan.btinternet.com... I probably have not understood you correctly, but can you not simply convert the double to a string an then truncate the string to the correct
length? As far as I am aware, a real number is simply a number which is not imaginary, so I dont know how this differs in a Pascal Real number. Your function seems to convert a string into a double but goes a long way around. BTW, I actually tried to convert "1.2345" and it returned 0.0
I'm sure Im missing something here, can you illuminate ?
Regards  OHM
David Scemama wrote: Hi,
I'm writing a program using VB.NET that needs to communicate with a DOS Pascal program than cannot be modified. The communication channel is through some file databases, and I have a huge problem writing VB Double values to the file so as the Pascal program can read them as Pascal Real values.
I've managed to find the algorithm to read the Pascal Real format and convert it to a VB Double, but I cannot figure out the opposite algorithm.
Can someone help me reverse my algorithm and develop the function "DoubleToReal (ByVal Data As Double) As String"
Here is the conversion from real to double:
Public Function RealToDouble(ByVal Data As String) As Double Dim dMantissa As Double Dim i As Integer Dim j As Long Dim k As Long
If Len(Data) <> 6 Then 'Err.Raise 'exception Exit Function End If
'accumulate the mantissa dMantissa = 1 For i = 6 To 2 Step 1 For j = CType(IIf(i = 6, 6, 7), Long) To 0 Step 1 k = k + 1 If (Asc(Mid$(Data, i, 1)) And CType(2 ^ j, Long)) <> 0 Then dMantissa = dMantissa + 2 ^ k End If Next j Next i
'finally, assemble all the pieces into a number If (Asc(Mid$(Data, 6, 1)) And &H80) = &H80 Then RealToDouble = dMantissa * 2 ^ (Asc(Mid$(Data, 1, 1))  129) Else RealToDouble = dMantissa * 2 ^ (Asc(Mid$(Data, 1, 1))  129) End If
Try Return ([Decimal].Round(CDec(RealToDouble), 2)) Catch ex As Exception 'MsgBox("RealToDouble, Conversion error: " & Data & "; " & RealToDouble.ToString, MsgBoxStyle.Critical) Return 0 End Try
End Function
Thanks for your help David
You'll probably get the reply in German !.
Regards  OHM
Cor wrote: Hi OHM,
Putted it in the vb.language.controls group.
Almost the private group from Herfied, I am curious what happens.
:))
Cor
Hay David,
This is clearly a complex conversion. I found this on the internet. It is
Quick Basic rendering of a solution to your problem ( Hopefully ). You will
need to amend it a bit for VB.NET, but hopefully it gives you a template to
work with.
HTH  OHM
DECLARE FUNCTION power# (x!, y AS INTEGER)
DECLARE SUB RealConv (RealCost AS ANY, NewCost#)
' the QBASIC equivalent of the above Pascal struct:
TYPE PASdataRecord
EmpNameLength AS STRING * 1
EmpName AS STRING * 30
Number AS INTEGER
Wage AS STRING * 6
END TYPE
' set up the file to be opened and read from QBASIC
DIM EmployeeDAT AS PASdataRecord
OPEN "EMPLOY.DAT" FOR RANDOM ACCESS READ LOCK WRITE AS #1 LEN =
LEN(EmployeeDAT)
' read the file a record at a time until the end
DO WHILE NOT EOF(1)
CLS
Count = Count + 1
SEEK #1, Count
GET #1, , EmployeeDAT
' strip out the actual string using the first length byte
EmployeeDAT.EmpName = MID$(EmployeeDAT.EmpName, 1,
ASC(EmployeeDAT.EmpNameLength))
' the following routine converts the pascal real to Qbasic double
CALL RealConv(EmployeeDAT.Wage, BASwage#)
PRINT "Employee number = "; EmployeeDAT.Number
PRINT "Employee EmpName = "; EmployeeDAT.EmpName
PRINT "Employee wage = "; BASwage
LOOP
FUNCTION power# (x, y AS INTEGER)
' simple x to the power of y function
power# = EXP(y * LOG(x))
END FUNCTION
SUB RealConv (Real$, NewCost#)
' create an array to hold each byte of the real string
DIM RealHold(6)
RealHold(1) = ASC(MID$(Real$, 1, 1))
RealHold(2) = ASC(MID$(Real$, 2, 1))
RealHold(3) = ASC(MID$(Real$, 3, 1))
RealHold(4) = ASC(MID$(Real$, 4, 1))
RealHold(5) = ASC(MID$(Real$, 5, 1))
RealHold(6) = ASC(MID$(Real$, 6, 1))
' if positive contains a number then its negative
positive = &H80 AND RealHold(6)
' clear the Pos/Neg bit from byte 6
RealHold(6) = &H80 OR RealHold(6)
' set up the significand as 1.0
Significand# = 1#
' check each individual bit for on/off; if on then multiply out the
' number (2,4,8,16,32,64,128, etc.)
FOR bytecheck = 2 TO 6
' bit 0 of byte
IF (RealHold(bytecheck) AND &H1) = 1 THEN
Significand# = Significand# + power(2, (0 + (bytecheck  2) * 8))
END IF
' bit 1 of byte
IF (RealHold(bytecheck) AND &H2) = 2 THEN
Significand# = Significand# + power(2, (1 + (bytecheck  2) * 8))
END IF
' bit 2 of byte
IF (RealHold(bytecheck) AND &H4) = 4 THEN
Significand# = Significand# + power(2, (2 + (bytecheck  2) * 8))
END IF
' bit 3 of byte
IF (RealHold(bytecheck) AND &H8) = 8 THEN
Significand# = Significand# + power(2, (3 + (bytecheck  2) * 8))
END IF
' bit 4 of byte
IF (RealHold(bytecheck) AND &H10) = 16 THEN
Significand# = Significand# + power(2, (4 + (bytecheck  2) * 8))
END IF
' bit 5 of byte
IF (RealHold(bytecheck) AND &H20) = 32 THEN
Significand# = Significand# + power(2, (5 + (bytecheck  2) * 8))
END IF
' bit 6 of byte
IF (RealHold(bytecheck) AND &H40) = 64 THEN
Significand# = Significand# + power(2, (6 + (bytecheck  2) * 8))
END IF
' bit 7 of byte
IF (RealHold(bytecheck) AND &H80) = 128 THEN
Significand# = Significand# + power(2, (7 + (bytecheck  2) * 8))
END IF
NEXT
' normalize the number by dividing calculated number by a number with all
' bits turned on: 2 to the power of 40
Significand# = Significand# / power(2, 40)
' calculate in the exponent
Number# = Significand# * power(2, (RealHold(1)  128))
' set the pos/neg sign
IF positive > 0 THEN Number# = Number# * 1
NewCost# = Number#
END
Unfortunately, this is the exact contrary of what I would like to do. This
function converts the Pascal Real contained in a string to a double.
Thanks
David
"One Handed Man" <Bo****@Duck.net> wrote in message
news:bq**********@titan.btinternet.com... Hay David,
This is clearly a complex conversion. I found this on the internet. It is Quick Basic rendering of a solution to your problem ( Hopefully ). You
will need to amend it a bit for VB.NET, but hopefully it gives you a template
to work with.
HTH  OHM
DECLARE FUNCTION power# (x!, y AS INTEGER) DECLARE SUB RealConv (RealCost AS ANY, NewCost#) ' the QBASIC equivalent of the above Pascal struct: TYPE PASdataRecord EmpNameLength AS STRING * 1 EmpName AS STRING * 30 Number AS INTEGER Wage AS STRING * 6 END TYPE ' set up the file to be opened and read from QBASIC DIM EmployeeDAT AS PASdataRecord OPEN "EMPLOY.DAT" FOR RANDOM ACCESS READ LOCK WRITE AS #1 LEN = LEN(EmployeeDAT) ' read the file a record at a time until the end DO WHILE NOT EOF(1) CLS Count = Count + 1 SEEK #1, Count GET #1, , EmployeeDAT ' strip out the actual string using the first length byte EmployeeDAT.EmpName = MID$(EmployeeDAT.EmpName, 1, ASC(EmployeeDAT.EmpNameLength)) ' the following routine converts the pascal real to Qbasic double CALL RealConv(EmployeeDAT.Wage, BASwage#) PRINT "Employee number = "; EmployeeDAT.Number PRINT "Employee EmpName = "; EmployeeDAT.EmpName PRINT "Employee wage = "; BASwage LOOP
FUNCTION power# (x, y AS INTEGER) ' simple x to the power of y function power# = EXP(y * LOG(x)) END FUNCTION
SUB RealConv (Real$, NewCost#) ' create an array to hold each byte of the real string DIM RealHold(6) RealHold(1) = ASC(MID$(Real$, 1, 1)) RealHold(2) = ASC(MID$(Real$, 2, 1)) RealHold(3) = ASC(MID$(Real$, 3, 1)) RealHold(4) = ASC(MID$(Real$, 4, 1)) RealHold(5) = ASC(MID$(Real$, 5, 1)) RealHold(6) = ASC(MID$(Real$, 6, 1)) ' if positive contains a number then its negative positive = &H80 AND RealHold(6) ' clear the Pos/Neg bit from byte 6 RealHold(6) = &H80 OR RealHold(6) ' set up the significand as 1.0 Significand# = 1# ' check each individual bit for on/off; if on then multiply out the ' number (2,4,8,16,32,64,128, etc.) FOR bytecheck = 2 TO 6 ' bit 0 of byte IF (RealHold(bytecheck) AND &H1) = 1 THEN Significand# = Significand# + power(2, (0 + (bytecheck  2) * 8)) END IF ' bit 1 of byte IF (RealHold(bytecheck) AND &H2) = 2 THEN Significand# = Significand# + power(2, (1 + (bytecheck  2) * 8)) END IF ' bit 2 of byte IF (RealHold(bytecheck) AND &H4) = 4 THEN Significand# = Significand# + power(2, (2 + (bytecheck  2) * 8)) END IF ' bit 3 of byte IF (RealHold(bytecheck) AND &H8) = 8 THEN Significand# = Significand# + power(2, (3 + (bytecheck  2) * 8)) END IF ' bit 4 of byte IF (RealHold(bytecheck) AND &H10) = 16 THEN Significand# = Significand# + power(2, (4 + (bytecheck  2) * 8)) END IF ' bit 5 of byte IF (RealHold(bytecheck) AND &H20) = 32 THEN Significand# = Significand# + power(2, (5 + (bytecheck  2) * 8)) END IF ' bit 6 of byte IF (RealHold(bytecheck) AND &H40) = 64 THEN Significand# = Significand# + power(2, (6 + (bytecheck  2) * 8)) END IF ' bit 7 of byte IF (RealHold(bytecheck) AND &H80) = 128 THEN Significand# = Significand# + power(2, (7 + (bytecheck  2) * 8)) END IF NEXT ' normalize the number by dividing calculated number by a number with all ' bits turned on: 2 to the power of 40 Significand# = Significand# / power(2, 40) ' calculate in the exponent Number# = Significand# * power(2, (RealHold(1)  128)) ' set the pos/neg sign IF positive > 0 THEN Number# = Number# * 1 NewCost# = Number# END
The exact representation of the Pascal Real type is:
Sign Significand Exponent
Width (bits) 1 39 8
David
"David Scemama" <da***********@nospam.wanadoo.fr> wrote in message
news:eF**************@TK2MSFTNGP12.phx.gbl... The Pascal Real type, is stored on 6 bytes with a very special coding.
When you write a real value in a file, 6 bytes are written to represent the
value (obviously, no language writes the string representation of the real !).
My function reads the 6 bytes and convert them to a VB double.
I need the reverse function !
David
"One Handed Man" <Bo****@Duck.net> wrote in message news:bp**********@titan.btinternet.com... I probably have not understood you correctly, but can you not simply convert the double to a string an then truncate the string to the correct
length? As far as I am aware, a real number is simply a number which is not imaginary, so I dont know how this differs in a Pascal Real number. Your function seems to convert a string into a double but goes a long way around. BTW, I actually tried to convert "1.2345" and it returned 0.0
I'm sure Im missing something here, can you illuminate ?
Regards  OHM
David Scemama wrote: Hi,
I'm writing a program using VB.NET that needs to communicate with a DOS Pascal program than cannot be modified. The communication channel is through some file databases, and I have a huge problem writing VB Double values to the file so as the Pascal program can read them as Pascal Real values.
I've managed to find the algorithm to read the Pascal Real format and convert it to a VB Double, but I cannot figure out the opposite algorithm.
Can someone help me reverse my algorithm and develop the function "DoubleToReal (ByVal Data As Double) As String"
Here is the conversion from real to double:
Public Function RealToDouble(ByVal Data As String) As Double Dim dMantissa As Double Dim i As Integer Dim j As Long Dim k As Long
If Len(Data) <> 6 Then 'Err.Raise 'exception Exit Function End If
'accumulate the mantissa dMantissa = 1 For i = 6 To 2 Step 1 For j = CType(IIf(i = 6, 6, 7), Long) To 0 Step 1 k = k + 1 If (Asc(Mid$(Data, i, 1)) And CType(2 ^ j, Long)) <> 0 Then dMantissa = dMantissa + 2 ^ k End If Next j Next i
'finally, assemble all the pieces into a number If (Asc(Mid$(Data, 6, 1)) And &H80) = &H80 Then RealToDouble = dMantissa * 2 ^ (Asc(Mid$(Data, 1, 1))  129) Else RealToDouble = dMantissa * 2 ^ (Asc(Mid$(Data, 1, 1))  129) End If
Try Return ([Decimal].Round(CDec(RealToDouble), 2)) Catch ex As Exception 'MsgBox("RealToDouble, Conversion error: " & Data & "; " & RealToDouble.ToString, MsgBoxStyle.Critical) Return 0 End Try
End Function
Thanks for your help David
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1Utility.py contains all the functions needed to calculate the variables and other minor things (mentions...

by: NeoPa 
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Hello everyone.
I find myself stuck trying to find the VBA way to get Access to create a PDF of the currentlyselected (and open) object (Form or Report).
I know it can be done by selecting :...

by: NeoPa 
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Introduction
For this article I'll be using a very simple database which has Form (clsForm) & Report (clsReport) classes that simply handle making the calling Form invisible until the Form, or all...

by: Teri B 
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Hi, I have created a subform Roles. In my course form the user selects the roles assigned to the course.
0netomany. One course many roles.
Then I created a report based on the Course form and...

by: isladogs 
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The next Access Europe meeting will be on Wednesday 1 Nov 2023 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM)
Please note that the UK and Europe revert to winter time on...

by: NeoPa 
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Introduction
For this article I'll be focusing on the Report (clsReport) class. This simply handles making the calling Form invisible until all of the Reports opened by it have been closed, when it...

by: isladogs 
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The next online meeting of the Access Europe User Group will be on Wednesday 6 Dec 2023 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM).
In this month's session, Mike...
 