CGDIDlg

void CGDIDlg::OnLoadFile() 
{
	CBitmap bmp;
    bmp.LoadBitmap(IDB_MYBMP);

    //假设是在一个CWnd派生类的成员函数中
    CClientDC dc(this);
    CDC memdc;
    memdc.CreateCompatibleDC(&dc);
    CBitmap *oldbmp=memdc.SelectObject(&bmp);
    dc.BitBlt(0,0,100,100,&memdc,0,0,SRCCOPY);
    if(oldbmp)
        memdc.SelectObject(oldbmp);	
}

void CGDIDlg::OnLoadIi() 
{
	// TODO: Add your command handler code here
	CBitmap bmp;
    bmp.LoadBitmap(IDB_MYBMP);
	
	CClientDC dc(this);
	dc.DrawState(CPoint(0,0),CSize(200,200),&bmp,DST_BITMAP);

}

//#include "GDI.h"
//extern CGDIApp theApp;

void CGDIDlg::OnLoadIii() 
{
	//从资源Load一个位图，如果从文件load的话，可以使用::LoadImage()
	HINSTANCE hInstance=AfxGetApp()->m_hInstance; //theApp.m_hInstance;
	HBITMAP hbmp=::LoadBitmap(hInstance,MAKEINTRESOURCE(IDB_MYBMP));
	//Win32 API的版本:
	//假设位图大小为100*100像素
    //假设hwnd是要绘制的窗口的HANDLE
	HWND hwnd=this->m_hWnd;
    HDC hwnddc=::GetDC(hwnd);//HDC GetDC(HWND hWnd)
    HDC memdc=::CreateCompatibleDC(hwnddc);
    HBITMAP oldbmp=(HBITMAP)::SelectObject(memdc,hbmp);
    ::BitBlt(hwnddc,0,0,100,100,memdc,0,0,SRCCOPY);
    if(oldbmp)
        ::SelectObject(memdc,oldbmp);
    DeleteDC(memdc);
    ::ReleaseDC(hwnd,hwnddc);
	
}