Изменить цвет фона клиентского окна - C++ WinAPI - Ответ 6310457

#include <Windows.h>
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
    HWND hMainWnd;
    char szClassName[] = "MyClass";
 
    MSG msg;
    WNDCLASSEX wc;
 
    wc.cbSize = sizeof(wc);
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(NULL, IDI_WARNING);
    wc.hCursor = LoadCursor(NULL, IDC_NO);
    wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = szClassName;
    wc.hIconSm = LoadIcon(NULL, IDI_WARNING);
 
 
 
    if(!RegisterClassEx(&wc)) {
        MessageBox(NULL, "Cannot register class", "Error", MB_OK);
        return 0;
    }
 
    hMainWnd = CreateWindow (
        szClassName, "A Helll Application", WS_OVERLAPPEDWINDOW,
        600, 250, 
        500, 500,
        (HWND)NULL,
        (HMENU)NULL,
        (HINSTANCE)hInstance, 
        NULL
        );
 
 
    if(!hMainWnd) {
        MessageBox(NULL, "Cannot create main window", "Error", MB_OK);
        return 0;
    }
 
    ShowWindow(hMainWnd, nCmdShow);
    while(GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
 
    return msg.wParam;
}
 
LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
    HDC hDc;
    PAINTSTRUCT ps;
    RECT rect;
 
    switch(uMsg) {
    case WM_PAINT:
        hDc = BeginPaint(hWnd, &ps);
 
        GetClientRect(hWnd, &rect);
        DrawText(hDc, "", -1, &rect,
            DT_SINGLELINE | DT_CENTER | DT_VCENTER);
 
        EndPaint(hWnd, &ps);
        break;
 
    case WM_CLOSE:
        DestroyWindow(hWnd);
        break;
 
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
 
    default:
        return DefWindowProc(hWnd, uMsg, wParam, lParam);
    }
 
    return 0;
}