MessageBoxA

#include <Windows.h>

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR szCmdLine, int nCmdShow) {
 char text1[] = "안뇽";
 char text2[] = "첫번째";
 MessageBoxA(NULL,text1,text2,NULL);

 return 0;
}