Windows API - GetUserName

 1 #include <stdio.h>
 2 #include <windows.h>
 3
 4 #define INFO_BUFFER_SIZE 32767
 5
 6 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
 7 {
 8     TCHAR  infoBuf[INFO_BUFFER_SIZE];
 9     DWORD  bufCharCount = INFO_BUFFER_SIZE;
10     if( !GetUserName( infoBuf, &bufCharCount ) )
11         {
12             MessageBox(NULL, TEXT("无法获得用户名"),TEXT("错误"),MB_ICONSTOP|MB_OK);
13         }
14     else
15         {
16             char istr[INFO_BUFFER_SIZE];
17             sprintf(istr,"欢迎使用本程序，当前用户名为：\r\n%s",infoBuf);
18             MessageBox(NULL,TEXT(istr),"MSG",MB_OK);
19         }
20     return 0;
21 }