private void ReleaseAll()
{
if (null != this._oContextMenu)
{
Marshal.ReleaseComObject(this._oContextMenu);
this._oContextMenu = null;
}
if (null != this._oContextMenu2)
{
Marshal.ReleaseComObject(this._oContextMenu2);
this._oContextMenu2 = null;
}
if (null != this._oContextMenu3)
{
Marshal.ReleaseComObject(this._oContextMenu3);
this._oContextMenu3 = null;
}
if (null != this._oDesktopFolder)
{
Marshal.ReleaseComObject(this._oDesktopFolder);
this._oDesktopFolder = null;
}
if (null != this._oParentFolder)
{
Marshal.ReleaseComObject(this._oParentFolder);
this._oParentFolder = null;
}
if (null != this._arrPIDLs)
{
this.FreePIDLs(this._arrPIDLs);
this._arrPIDLs = null;
}
}
private ShellContextMenu.IShellFolder GetDesktopFolder()
{
IntPtr zero = IntPtr.Zero;
if (null == this._oDesktopFolder)
{
int num = ShellContextMenu.SHGetDesktopFolder(out zero);
if (0 != num)
{
throw new ShellContextMenuException("Failed to get the desktop shell folder");
}
this._oDesktopFolder = (ShellContextMenu.IShellFolder)Marshal.GetTypedObjectForIUnknown(zero, typeof(ShellContextMenu.IShellFolder));
}
return(this._oDesktopFolder);
}
private bool GetContextMenuInterfaces(ShellContextMenu.IShellFolder oParentFolder, IntPtr[] arrPIDLs, out IntPtr ctxMenuPtr)
{
int uIObjectOf = oParentFolder.GetUIObjectOf(IntPtr.Zero, (uint)arrPIDLs.Length, arrPIDLs, ref ShellContextMenu.IID_IContextMenu, IntPtr.Zero, out ctxMenuPtr);
bool result;
if (0 == uIObjectOf)
{
this._oContextMenu = (ShellContextMenu.IContextMenu)Marshal.GetTypedObjectForIUnknown(ctxMenuPtr, typeof(ShellContextMenu.IContextMenu));
result = true;
}
else
{
ctxMenuPtr = IntPtr.Zero;
this._oContextMenu = null;
result = false;
}
return(result);
}
private ShellContextMenu.IShellFolder GetParentFolder(string folderName)
{
ShellContextMenu.IShellFolder result;
if (null == this._oParentFolder)
{
ShellContextMenu.IShellFolder desktopFolder = this.GetDesktopFolder();
if (null == desktopFolder)
{
result = null;
return(result);
}
IntPtr zero = IntPtr.Zero;
uint num = 0u;
ShellContextMenu.SFGAO sFGAO = (ShellContextMenu.SFGAO) 0u;
int num2 = desktopFolder.ParseDisplayName(IntPtr.Zero, IntPtr.Zero, folderName, ref num, out zero, ref sFGAO);
if (0 != num2)
{
result = null;
return(result);
}
IntPtr intPtr = Marshal.AllocCoTaskMem(524);
Marshal.WriteInt32(intPtr, 0, 0);
num2 = this._oDesktopFolder.GetDisplayNameOf(zero, ShellContextMenu.SHGNO.FORPARSING, intPtr);
StringBuilder stringBuilder = new StringBuilder(260);
ShellContextMenu.StrRetToBuf(intPtr, zero, stringBuilder, 260);
Marshal.FreeCoTaskMem(intPtr);
intPtr = IntPtr.Zero;
this._strParentFolder = stringBuilder.ToString();
IntPtr zero2 = IntPtr.Zero;
num2 = desktopFolder.BindToObject(zero, IntPtr.Zero, ref ShellContextMenu.IID_IShellFolder, out zero2);
Marshal.FreeCoTaskMem(zero);
if (0 != num2)
{
result = null;
return(result);
}
this._oParentFolder = (ShellContextMenu.IShellFolder)Marshal.GetTypedObjectForIUnknown(zero2, typeof(ShellContextMenu.IShellFolder));
}
result = this._oParentFolder;
return(result);
}
protected IntPtr[] GetPIDLs(DirectoryInfo[] arrFI)
{
IntPtr[] result;
if (arrFI == null || 0 == arrFI.Length)
{
result = null;
}
else
{
ShellContextMenu.IShellFolder parentFolder = this.GetParentFolder(arrFI[0].Parent.FullName);
if (null == parentFolder)
{
result = null;
}
else
{
IntPtr[] array = new IntPtr[arrFI.Length];
int num = 0;
for (int i = 0; i < arrFI.Length; i++)
{
DirectoryInfo directoryInfo = arrFI[i];
uint num2 = 0u;
ShellContextMenu.SFGAO sFGAO = (ShellContextMenu.SFGAO) 0u;
IntPtr zero = IntPtr.Zero;
int num3 = parentFolder.ParseDisplayName(IntPtr.Zero, IntPtr.Zero, directoryInfo.Name, ref num2, out zero, ref sFGAO);
if (0 != num3)
{
this.FreePIDLs(array);
result = null;
return(result);
}
array[num] = zero;
num++;
}
result = array;
}
}
return(result);
}
