In my ComboBox, I am trying to post the CBN_EDITCHANGE message after
the
CBN_SELCHANGE is received, but I am having no luck. I can trap for the
CBN_SELCHANGE message, but I cannot post the CBN_EDITCHANGE message. I
think
my PostMessage parameters are wrong, but I cannot find what they should
be.
Any help would be greatly appreciated. Thanks.
Here is my code.
Private Declare Function PostMessage Lib "user32" Alias "PostMessag eA"
_
(ByVal hwnd As Long, _
ByVal wMsg As Long, _
ByVal wParam As Long, _
ByVal lParam As Long) As Long
Protected Overrides Sub WndProc(ByRef m As Message)
MyBase.WndProc( m)
Const CBN_SELCHANGE As Int32 = &H1
Const CBN_EDITCHANGE As Int32 = &H5
Const CBN_EDITUPDATE As Int32 = &H6
Const CBN_CLOSEUP As Int32 = &H8
Const CBN_SELENDOK As Int32 = &H9
Const WM_COMMAND As Int32 = &H111
Const WM_USER As Int32 = &H400
Const OCM__BASE As Int32 = WM_USER + &H1C00
Const OCM_COMMAND As Int32 = OCM__BASE + WM_COMMAND
If m.Msg = OCM_COMMAND Then
Dim CbAction As Int32 = (m.WParam.ToInt 32 >> 16) ' combobox action
Select Case CbAction
Case CBN_SELCHANGE
PostMessage(Me. Handle.ToInt32, OCM_COMMAND, _
CBN_EDITCHANGE << 16, 0)
Case CBN_EDITCHANGE
Case CBN_CLOSEUP
Case CBN_SELENDOK
End Select
End If
End Sub 3 5625
Hi,
Change the longs in the postmessage declare to integers. The dotnet
integer is the same as the vb6 long
Ken
--------------------
<ea********@gma il.com> wrote in message
news:11******** **************@ f14g2000cwb.goo glegroups.com.. . In my ComboBox, I am trying to post the CBN_EDITCHANGE message after the CBN_SELCHANGE is received, but I am having no luck. I can trap for the CBN_SELCHANGE message, but I cannot post the CBN_EDITCHANGE message. I think my PostMessage parameters are wrong, but I cannot find what they should be. Any help would be greatly appreciated. Thanks.
Here is my code.
Private Declare Function PostMessage Lib "user32" Alias "PostMessag eA" _ (ByVal hwnd As Long, _ ByVal wMsg As Long, _ ByVal wParam As Long, _ ByVal lParam As Long) As Long
Protected Overrides Sub WndProc(ByRef m As Message) MyBase.WndProc( m)
Const CBN_SELCHANGE As Int32 = &H1 Const CBN_EDITCHANGE As Int32 = &H5 Const CBN_EDITUPDATE As Int32 = &H6 Const CBN_CLOSEUP As Int32 = &H8 Const CBN_SELENDOK As Int32 = &H9 Const WM_COMMAND As Int32 = &H111 Const WM_USER As Int32 = &H400 Const OCM__BASE As Int32 = WM_USER + &H1C00 Const OCM_COMMAND As Int32 = OCM__BASE + WM_COMMAND
If m.Msg = OCM_COMMAND Then Dim CbAction As Int32 = (m.WParam.ToInt 32 >> 16) ' combobox action Select Case CbAction Case CBN_SELCHANGE PostMessage(Me. Handle.ToInt32, OCM_COMMAND, _ CBN_EDITCHANGE << 16, 0) Case CBN_EDITCHANGE Case CBN_CLOSEUP Case CBN_SELENDOK End Select End If End Sub
Thanks. It did the trick.
I am still a little confused. In all the searching I did on the
'net, all the old (around 2001 and earlier) examples I found had:
Private Declare Function PostMessage Lib "user32" Alias "PostMessag eA"
_
(ByVal hwnd As intptr, _
ByVal wMsg As integer, _
ByVal wParam As integer, _
ByVal lParam As integer) As Boolean
And all the newer examples had the way I declared (that is way I went
this way):
Private Declare Function PostMessage Lib "user32" Alias "PostMessag eA"
_
(ByVal hwnd As Long, _
ByVal wMsg As Long, _
ByVal wParam As Long, _
ByVal lParam As Long) As Long
Where can I find the documentation on PostMessage?
Eric
<ea********@gma il.com> schrieb Where can I find the documentation on PostMessage?
Menu Help -> Index, type "postmessag e"
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In my ComboBox, I am trying to post the CBN_EDITCHANGE message after the
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Any help would be greatly appreciated. Thanks.
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