Win32 API编程：WinMain无法重载函数或_tWinMain无法重载

#include "windows.h"
#include "tchar.h"
 
int APIENTRY _tWinMain(
     HINSTANCE hInstance,
     HINSTANCE hPrevInstance,
     LPTSTR lpCmdLine,
     int nCmdShow
     ) {
     MessageBox(NULL, TEXT( "Hello,World!" ), TEXT( "haha" ), MB_OK);
     return 0;
}

#include "windows.h"
#include "tchar.h"
 
int APIENTRY WinMain(
     HINSTANCE hInstance,
     HINSTANCE hPrevInstance,
     LPSTR lpCmdLine,
     int nCmdShow
     ) {
     MessageBox(NULL, TEXT( "Hello,World!" ), TEXT( "haha" ), MB_OK);
     return 0;
}