Can I paint on Qt widget by invoking win32 sdk api?

Can I paint on Qt widget by invoking win32 sdk api?
The code is below, it seems that do not work.
I want to implement such function for some special aim.

Code:

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PAINTSTRUCT ps;
HWND hwnd = (HWND)winId();
HDC hdc = BeginPaint(hwnd,&ps);
::MoveToEx(hdc, 0, 0, NULL);
bool stat = ::LineTo(hdc, 500, 500);
EndPaint(hwnd,&ps);

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The codes are all in function paintEvent.

I'm not sure but think this is possible. If I remember correctly I once drew using X libs on Linux (not sure even about the Qt version I used then), so likewise this might also be possible on Windows. Where is the referred code placed in the class and are you sure it didn't work{Ok, got it now}, I meant Qt might have drawn something on it afterwards.

Quote:

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Originally Posted by yogeshm02

I'm not sure but think this is possible. If I remember correctly I once drew using X libs on Linux (not sure even about the Qt version I used then), so likewise this might also be possible on Windows. Where is the referred code placed in the class and are you sure it didn't work{Ok, got it now}, I meant Qt might have drawn something on it afterwards.

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The codes are placed in function paintEvent.