How are Win32 types represented in C# P/Invoke?

Question

I am trying to call the PrintDlgW Win32 API from C# via P/Invoke. With the help of P/Invoke Interop Assistant 1.0 from Microsoft, I am able to declare necessary data structures and import functions from DLL. But how to use the HDC or HWND in C#? Thanks in advance.

Answer 1

HWND in C++ is really a void *, which is represented in C# by the IntPtr type.

Answer 2

It might make it easier to do this

using HWND = System.IntPtr;

Then use HWND in your pInvoke...to make it easier to read and keep it "the same" as the pinvoke signature.

Hope this helps, Best regards, Tom.

Answer 3

This site has nice examples with structures already defined for quite a few APIs. The structure is here.