Some questions about wglMakeCurrent

If I use this function ,is OpenGL
rendered over DirectDraw?
I don’t understand why it using
handle on device context as parameter.
It’s like DirectDraw conventions.
If it true ,how I can disable
DirectDraw in OpenGL(without GLUT)?

??? Um, have a look at the docs for that.
Making something for openGL or DX is a different process, it depends on how you set it up.

Why would you want to disable directdraw anyway? If you aren’t using it, then it won’t load it.

you understand my question.
I don’t want disbale DirectDraw,
but I want init OpenGL without DirectDraw.
Anyway ,how I can create fullscreen

I’m not sure how DirectDraw plays into your question… wglMakeCurrent is a way for OpenGL to know which Windows rendering context should recieve the drawing calls.

As far as making a window fullscreen, you need to do something like this:

DEVMODE gWindowMode;

gWindowMode.dmSize = sizeof(DEVMODE);
gWindowMode.dmBitsPerPel = 0;
gWindowMode.dmPelsWidth = width;
gWindowMode.dmPelsHeight = height;
gWindowMode.dmDisplayFlags = 0;
gWindowMode.dmDisplayFrequency = 0;
gWindowMode.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT;

ChangeDisplaySettings(&gWindowMode, CDS_FULLSCREEN);

I generally do this upon WM_ACTIVATE when the LOWORD(wParam) is WA_ACTIVE.

Make sure you change it back to non-fullscreen when you are finished.

ChangeDisplaySettings(NULL, 0);

You also probably want to make sure your window style (passed into CreateWindow) does not contain WS_BORDER or WS_CAPTION.


thank you very much.