strucure with buffer

[Ralph Heger]

Hi

An API-Function I want to use needs a structure as parameter:

public structure myStruct
dim i1 as short
dim i2 as byte
dim i3 as integer
dim buffer as byte()
end structure

buffer is an array of fixed length. But how could I correctly declare
buffer, so that is really behind i3 in memory? <VBFixedArray(512)> doesn't
work in that case, and declaring b1, b2, b3, b4,... as byte does work, but
who wouild really want to do that.
Any ideas?

thanks

Ralph

[Ken Tucker [MVP]]

Hi,

Redim buffer after you create the structure.

Dim m As myStruct
ReDim m.buffer(512)
Ken
--------------------
"Ralph Heger" <ra*********@softart.at> wrote in message
news:43***********************@newsreader.inode.at ...

Hi

An API-Function I want to use needs a structure as parameter:

public structure myStruct
dim i1 as short
dim i2 as byte
dim i3 as integer
dim buffer as byte()
end structure

buffer is an array of fixed length. But how could I correctly declare
buffer, so that is really behind i3 in memory? <VBFixedArray(512)> doesn't
work in that case, and declaring b1, b2, b3, b4,... as byte does work, but
who wouild really want to do that.
Any ideas?

thanks

Ralph

[Ralph Heger]

Thanks, Ken

I have got a solution from an other usegroup. The problem with your solution
is, that you can't be sure that the memory that 'buffer' needs is on the
wright location. But declaring buffer with
'<MarshalAs(UnmanagedType.ByValArray, SizeConst := 512)>' does the job.

thanks
Ralph

"Ken Tucker [MVP]" <vb***@bellsouth.net> schrieb im Newsbeitrag
news:eC***************@TK2MSFTNGP10.phx.gbl...

Hi,

Redim buffer after you create the structure.

Dim m As myStruct
ReDim m.buffer(512)
Ken
--------------------
"Ralph Heger" <ra*********@softart.at> wrote in message
news:43***********************@newsreader.inode.at ...

Hi

An API-Function I want to use needs a structure as parameter:

public structure myStruct
dim i1 as short
dim i2 as byte
dim i3 as integer
dim buffer as byte()
end structure

buffer is an array of fixed length. But how could I correctly declare
buffer, so that is really behind i3 in memory? <VBFixedArray(512)>
doesn't work in that case, and declaring b1, b2, b3, b4,... as byte does
work, but who wouild really want to do that.
Any ideas?

thanks

Ralph

[Dennis]

Can you use:

<StructLayout(LayoutKind.Sequential)> _
Public Structure MyStructure
.....

--
Dennis in Houston
"Ralph Heger" wrote:

Thanks, Ken

I have got a solution from an other usegroup. The problem with your solution
is, that you can't be sure that the memory that 'buffer' needs is on the
wright location. But declaring buffer with
'<MarshalAs(UnmanagedType.ByValArray, SizeConst := 512)>' does the job.

thanks
Ralph

"Ken Tucker [MVP]" <vb***@bellsouth.net> schrieb im Newsbeitrag
news:eC***************@TK2MSFTNGP10.phx.gbl...

Hi,

Redim buffer after you create the structure.

Dim m As myStruct
ReDim m.buffer(512)
Ken
--------------------
"Ralph Heger" <ra*********@softart.at> wrote in message
news:43***********************@newsreader.inode.at ...

Hi

An API-Function I want to use needs a structure as parameter:

public structure myStruct
dim i1 as short
dim i2 as byte
dim i3 as integer
dim buffer as byte()
end structure

buffer is an array of fixed length. But how could I correctly declare
buffer, so that is really behind i3 in memory? <VBFixedArray(512)>
doesn't work in that case, and declaring b1, b2, b3, b4,... as byte does
work, but who wouild really want to do that.
Any ideas?

thanks

Ralph