C++ 获取当前路径

void CGetCurrentDirectoryDlg::OnGet() 
{
	char buf[256]="";
	DWORD dw;
	dw = GetCurrentDirectory(sizeof(buf),buf);	
	if(dw == 0)
	{
		MessageBox("获取路径失败");
		return;
	}
	else
		m_path.SetWindowText(buf);
}