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;
}

当采用_tWinMain作为入口函数时，第三个参数类型应定义为LPTSTR，表示WCHAR *型

#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;
}

　当采用WinMain作为入口函数时，第三个参数类型应定义为LPSTR，表示CHAR *型

否则出现“WinMain无法重载函数”或_tWinMain无法重载函数“”