[WinAPI] API 1 [桌面上画一个简单彩色图形]

 #include<Windows.h>

 void GdiOut(HDC hdc);

 int WINAPI WinMain(HINSTANCE hInstance,

                    HINSTANCE hPrevInstance,

                    LPSTR lpCmdLine,

                    int nCmdShow)

 {

     HDC hdc=GetDC(NULL);

     GdiOut(hdc);

     ReleaseDC(NULL,hdc);

 }

 void GdiOut(HDC hdc)

 {

     HPEN hpen;

     HBRUSH hbrush;

     BYTE bRed=;

     BYTE bGreen=;

     BYTE bBlue=;

     COLORREF cPen=RGB(bRed,bGreen,bBlue);

     COLORREF cBrush=RGB(,GetGValue(cPen),);

     hpen=CreatePen(PS_SOLID,,cPen);

     hbrush=CreateSolidBrush(cBrush);

     SelectObject(hdc,hbrush);

     LineTo(hdc,,);

     SelectObject(hdc,hpen);

     Rectangle(hdc,,,,);

     DeleteObject(hpen);

     DeleteObject(hbrush);

 }