win api DoubleBuffering

Question

我不擅长winapi领域..所以我想请你帮忙。

以下是代码。

void DrawScreen(HDC hdc)
{
 int x = 0;
 int y = 0;
 BITMAP bit;
 HBITMAP backBitmap;
 HBITMAP hOldBitmap;
 HBITMAP hOldBitmap2;
 HDC backMemDC, MemDc;
 backBitmap = CreateCompatibleBitmap(hdc, rt.right, rt.bottom);
 backMemDC = CreateCompatibleDC(hdc);
 MemDc = CreateCompatibleDC(backMemDC);

//hOldBitmap2 = (HBITMAP)SelectObject(MemDc, backBmitmap2);
 FillRect(backMemDC, &rt, (HBRUSH)GetStockObject(WHITE_BRUSH)); 
 hOldBitmap = (HBITMAP)SelectObject(backMemDC, backBitmap);
 for ( y = 0; y < 3; ++y)
 {
    for ( x = 0; x < 3; ++x)
    {
        switch (cChessBoard[y][x])
        {
        case '#':
            iBit = WHITE_BOARD;
            break;
        case '@':
            iBit = BLACK_BOARD;
            break;
            SelectObject(MemDc, hBit[iBit]);

        }//end of switch
        hOldBitmap2 = (HBITMAP)SelectObject(MemDc,hBit[iBit]);
        BitBlt(backMemDC, x*BW, y*BH, BW, BH, MemDc, 0, 0, SRCCOPY);

    }//end of for

}//end of for

hOldBitmap2 = (HBITMAP)SelectObject(MemDc, hBit[PLAYER]);
BitBlt(backMemDC, Player.m_iX*BW, Player.m_iY*BH, BW, BH, MemDc, 0, 0, SRCCOPY);

//InvalidateRect(hWndMain, NULL, FALSE);
BitBlt(hdc, 0, 0, rt.right, rt.bottom, backMemDC, 0, 0, SRCCOPY);
ReleaseDC(hWndMain,hdc);
DeleteObject(hOldBitmap);
DeleteDC(backMemDC);
DeleteDC(MemDc);
}

从上面的代码中可以看出，我想做双缓冲。

但我仍然无法停止闪烁......有人帮我吗？

转移到内存直流并将内容移动到hdc是不对的？