System::IntPtr to HDC

[Manuel Costa]

How the hell do i convert System::IntPtr to HDC?

manuel

 

[Mattias Sjögren]

How the hell do i convert System::IntPtr to HDC?

Call IntPtr::ToPointer() and cast the result to HDC.



Mattias

 

[Manuel Costa]

I think that i have a compilation problem by mixing old code with new
directives for .net. (HDC)(int) returns an undifined value.
Any guess or suggestion to trace down the problem and find a possible
workaround?

manuel

 

[ismailp]

See below:

HWND hwnd = (HWND)textBox1->Handle.ToPointer();
HDC hdc = GetDC(hwnd);
IntPtr dc = hdc;
HDC hdc_ = (HDC)dc.ToPointer();
ReleaseDC(hwnd, hdc_);

XXXPtr value types have a "ToPointer()" method, which give you a
"void*". You can convert void* to HWND, or HDC, which are actually
void*.

Ismail

 

[Manuel Costa]

It does not work.
Casting to HDC gives me an undifined value.
In this project i had some other weird problems like a stack overflow when a
specific constructor was invoked. I'm almost sure it is a problem with the
default directives for the .net compliance.

manuel