mirek wrote on Wed, 04 March 2020 13:06

I think the problem is that context is created but not associated with current thread.

Try with ExecuteGL method...

Hello Mirek, you are right, doing this kind of thing work :

void GLCtrl::GLPane::ExecuteGL(HDC hDC, Event<> paint, bool swap_buffers)
{
	static bool HaveBeenInitialised = false;
	wglMakeCurrent(hDC, s_openGLContext);
	if(!HaveBeenInitialised){
		static_cast<GLCtrl*>(parent)->Initialisation();//--> I call Initialisation Here
		HaveBeenInitialised = true;
	}
	paint();
	if(swap_buffers)
		SwapBuffers(hDC);
	else
		glFlush();
	wglMakeCurrent(NULL, NULL);
	
}

mirek wrote on Wed, 04 March 2020 13:06

That said, doing this in GLPaint actually seems fine to me.

Yes, it work aswell but the idea of having a visible boolean just to do some action at the first loop of drawing is disturbing me (the fix I did in ExecuteGL(...) is basicly the same things but user don't see it Is it possible to add it to the GLCtrl code or you prefer stay like that ?

Thanks in advance
Best regard !