修改已经打开的对话框的浏览路径

CWnd * pWnd = FindWindow(NULL,"另存为");
CString sCtrlName;
CWnd *pedit;
CString filename;
TCHAR BUF[512];
if(pWnd)
{
CWnd *pwnd=pWnd->GetWindow(GW_CHILD);//枚举保存对话框的所有子控件
char *buf=new char[512];
while(pwnd!=NULL)
{
::GetClassName(pwnd->GetSafeHwnd(),buf,512);//得到枚举的控件是什么类型的，
CString str=buf;
str.TrimRight();
if(str=="Edit")//如果枚举到保存文件名的EDIT
{
pedit=pwnd;//保存EDIT句柄用来发消息
pwnd->SendMessage(WM_GETTEXT,sizeof(BUF)/sizeof(TCHAR),(LPARAM)(void*)BUF);
filename=BUF;//完成第一步保存原始的文件名
}
if(str=="Button")//枚举到按钮，有保存和取消按钮
{
pwnd->SendMessage(WM_GETTEXT,sizeof(BUF)/sizeof(TCHAR),(LPARAM)(void*)BUF);
//发消息得到按钮的标题
CString str=BUF;
str.TrimRight();
if(str=="保存(&S)")//如果是保存按钮
{
lstrcpy(BUF,(LPCTSTR)sPath);//sPath表示我们要设置的对话框浏览目录
//发消息设置文件名EDIT为我们的路径名
pedit->SendMessage(WM_SETTEXT,0,(LPARAM)BUF);
//发消息模拟点击保存按钮
::SendMessage(pwnd->GetSafeHwnd(),WM_LBUTTONDOWN,0,0);
::SendMessage(pwnd->GetSafeHwnd(),WM_LBUTTONUP,0,0);
}
}
}
pwnd = pwnd->GetNextWindow();
}
pedit->SendMessage(WM_SETTEXT,0,(LPARAM)filename);//发消息还原EDIT里的文件名
delete buf;