Hello,
i have two applications (once in vb6 and once in c#) which have to
communicate together. They have to send and receive strings.
I used api-method sendmessage, but it doesn't work.
in vb:
Private Declare Function SendMessageByStr& Lib
"user32" Alias "SendMessageA" _
(ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long,
ByVal _
lParam As String)
[..]
[code:1:5274173893]Call SendMessageByStr(hwndTarget, MessageId, 4,
"test")[/code:1:5274173893]
in C#:
[code:1:5274173893]unsafe protected override void WndProc(ref
Message m)
{
if (m.Msg == VB6_TO_CSHARP_MessageId.ToInt32())
{
try
{
string url = new
string((char*)(m.LParam.ToPointer()), 0,
m.WParam.ToInt32());
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
}
base.WndProc(ref m);
} [/code:1:5274173893]
There is an exception by reading string. Has anyone sourcecode to send
and receive strings from VB6 and C# applications?
As an example project use this from codeproject (this project only
send normaly messages, no strings):
http://www.codeproject.com/dotnet/VB6andVBNETWindowMessages.asp
Can you help?
Sincerely,
Andre
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