Dialog that can remember last selected folder, using MFC
//下面的代码将调出一个选择目录的对话框
BROWSEINFO bi;
char Buffer[MAX_PATH];
bi.hwndOwner = m_hWnd;
bi.pidlRoot = NULL;
bi.pszDisplayName = Buffer;
bi.lpszTitle = "Select drectory";
bi.ulFlags = BIF_RETURNONLYFSDIRS | BIF_NEWDIALOGSTYLE | BIF_VALIDATE;
bi.iImage = 0;
//注册一个callback,来设定目录选择对话框的初始选择目录
//这里假设lastpath是用来记录初始选择目录的字串指针
//即打开选择目录对话框时,默认选择上一回选择的目录
if (lastpath != NULL) //该值可以存放于全局变量或存储于配置文件中
{
bi.lParam = lastpath; //传给callback的参数,即初始选择的目录路径
}
else
{
bi.lParam = NULL;
}
bi.lpfn = BrowseCallbackProc; //注册回调函数
LPITEMIDLIST pIDList = SHBrowseForFolder(&bi); //显示目录选择对话框
if(pIDList)
{
SHGetPathFromIDList(pIDList, Buffer); //获取用户选择的目录
Global_Free(pIDList);//记得释放pIDList,这里函数名记不太清了,大伙可以查下MSDN
}
//回调函数的实现,主要响应两个消息
inline int CALLBACK BrowseCallbackProc(HWND hwnd, UINT uMsg, LPARAM lParam, LPARAM lpData)
{
lParam = lParam;
switch(uMsg)
{
case BFFM_INITIALIZED: //初始化时,选择我们记录的路径
{
::SendMessage(hwnd,BFFM_SETSELECTION,TRUE,(LPARAM)lpData);
}
break;
case BFFM_SELCHANGED: //目录选择改变时,记录选择的目录
{
::SendMessage(hwnd,BFFM_SETSTATUSTEXT,0,lpData);
}
break;
}
return 0;
}
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