ShellExecuteA()和ProgramExecute()都可以实现这个的！

1:
#pragma code("Shell32.dll")

VOID ShellExecuteA(HWND, LPCTSTR , LPCTSTR , LPCTSTR , LPCTSTR , INT);

#pragma code()

HWND handle;

handle=FindWindow(NULL,"WinCC-运行系统 - ");

ShellExecuteA(handle, "open", "C:\\Program Files\\Microsoft Office\\OFFICE11\\WINWORD.exe", NULL, "D:\\手动.doc",SW_SHOWMAXIMIZED);


2:
ProgramExecute(C:\\Program Files\\Microsoft Office11\\Office\\WINWORD.EXE D:\\MywORD.doc);

office2003+XP系统！