VS C++改变窗体背景色

可以简单的设置rgb/w/h的值。

static void changeBackground(HWND hwnd)
{

   /*
    RECT rect;
    GetClientRect(hwnd, &rect);
    int cxClient = rect.right;
    int cyClient = rect.bottom;
  */
    HDC hdc = GetDC(hwnd);//获取当前的显示设备上下文
    int w = 200;
    int h = 100;

    char* rgb = (char*)malloc(3*w*h);
    for (int i=0; i