Проблема при создании окна

#include<windows.h>
#include<tchar.h>
 
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
 
TCHAR WinName[] = _T("Main Frame");
 
int APIENTRY _tWinMain(HINSTANCE This, HINSTANCE Prev, LPTSTR cmd, int mode) {
    HWND hWnd;
    MSG msg;
    WNDCLASS wc;
 
    wc.hInstance = This;
    wc.lpszClassName = WinName;
    wc.lpfnWndProc = WndProc;
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.lpszMenuName = NULL;
    wc.cbClsExtra = wc.cbWndExtra = 0;
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
 
    if (!RegisterClass(&wc)) return 0;
 
    hWnd = CreateWindow(WinName, _T("Мое первое окно"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, HWND_DESKTOP, NULL, This, NULL);
 
    ShowWindow(hWnd, mode);
 
    while (GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
 
    return 0;
}
 
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lParam) {
    switch (message) {
    case WM_DESTROY: PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hwnd, message, wparam, lParam);
    }
    return 0;
}