/// <summary></summary>
protected override bool RunDialog(IntPtr hWndOwner)
{
IntPtr zero = IntPtr.Zero;
bool flag = false;
Win32.SHGetSpecialFolderLocation(hWndOwner, (int)this.mRootFolder, ref zero);
if (zero == IntPtr.Zero)
{
Win32.SHGetSpecialFolderLocation(hWndOwner, 0, ref zero);
if (zero == IntPtr.Zero)
{
throw new InvalidOperationException("No Root Folder.");
}
}
BrowseInfoFlag flags = BrowseInfoFlag.NewUserInterface;
if (!this.mShowNewFolderButton)
{
flags |= BrowseInfoFlag.NoNewFolderButton;
}
if (this.mIncludeFiles)
{
flags |= BrowseInfoFlag.BrowseEverything;
}
if (Control.CheckForIllegalCrossThreadCalls && (Application.OleRequired() != ApartmentState.STA))
{
throw new ThreadStateException("Thread Must Be STA.");
}
IntPtr pidl = IntPtr.Zero;
IntPtr hglobal = IntPtr.Zero;
IntPtr pszPath = IntPtr.Zero;
try
{
this.mCurrentCallback = new BrowseCallbackProc(this.FolderBrowserDialog_BrowseCallbackProc);
hglobal = Marshal.AllocHGlobal((int)(260 * Marshal.SystemDefaultCharSize));
pszPath = Marshal.AllocHGlobal((int)(260 * Marshal.SystemDefaultCharSize));
BROWSEINFO lpbi = new BROWSEINFO();
lpbi.pidlRoot = zero;
lpbi.hwndOwner = hWndOwner;
lpbi.pszDisplayName = hglobal;
lpbi.lpszTitle = this.mDescriptionText;
lpbi.ulFlags = (int)flags;
lpbi.lpfn = this.mCurrentCallback;
lpbi.lParam = IntPtr.Zero;
lpbi.iImage = 0;
pidl = Win32.SHBrowseForFolder(lpbi);
if (pidl != IntPtr.Zero)
{
Win32.SHGetPathFromIDList(pidl, pszPath);
this.mSelectedPathNeedsCheck = true;
this.mSelectedPath = Marshal.PtrToStringAuto(pszPath);
flag = true;
}
}
finally
{
IMalloc sHMalloc = GetSHMalloc();
sHMalloc.Free(zero);
if (pidl != IntPtr.Zero)
{
sHMalloc.Free(pidl);
}
if (pszPath != IntPtr.Zero)
{
Marshal.FreeHGlobal(pszPath);
}
if (hglobal != IntPtr.Zero)
{
Marshal.FreeHGlobal(hglobal);
}
this.mCurrentCallback = null;
}
return(flag);
}
public static extern IntPtr SHBrowseForFolder([In] BROWSEINFO lpbi);
