#include <windows.h>

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrev,
                PSTR cmdLine, int cmdShow)
{
        HWND  desktop = GetDesktopWindow();
        HDC   hdc = GetWindowDC(desktop);
        TCHAR label[] = TEXT("hoge");

        TextOut(hdc, 100, 100, label, lstrlen(label));

        UpdateWindow(desktop);
}