How can I pass a Windows Form handle to unmanaged DLL that expects HWND?
Even if I have a wrapper calss between managed C# and unmanaged C++, IntPtr
does not by default cast to HWND. Should I force it? Can somebody give an
example?
Gregory

Gregory Khra schrieb:
Normally that should not be a problem. Example:

C++ DLL:

#include <windows.h>

void NativeFct (HWND hWnd);




C# Wrapper:

class NativeMethods {
[DllImport("my.dll", EntryPoint = "NativeFct")]
public static extern void NativeFct(IntPtr hWnd);
}


C# Form:

class MyForm : Form {
void MyFunc () {
...
NativeMethods(this.Handle);
...
}
}

"Hans-Gerd Sandhagen" wrote:
I am getting a compiler error: cannot convert parameter ... from
'System::IntPtr' to 'HWND'. This error was the reason for my post.
Gregory