private void LoadPicture(System.Windows.Forms.UnsafeNativeMethods.IStream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
try
{
Guid gUID = typeof(System.Windows.Forms.UnsafeNativeMethods.IPicture).GUID;
System.Windows.Forms.UnsafeNativeMethods.IPicture o = null;
new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Assert();
try
{
o = System.Windows.Forms.UnsafeNativeMethods.OleCreateIPictureIndirect(null, ref gUID, true);
((System.Windows.Forms.UnsafeNativeMethods.IPersistStream)o).Load(stream);
if ((o == null) || (o.GetPictureType() != 3))
{
throw new ArgumentException(System.Windows.Forms.SR.GetString("InvalidPictureType", new object[] { "picture", "Cursor" }), "picture");
}
IntPtr handle = o.GetHandle();
System.Drawing.Size iconSize = this.GetIconSize(handle);
this.handle = System.Windows.Forms.SafeNativeMethods.CopyImageAsCursor(new HandleRef(this, handle), 2, iconSize.Width, iconSize.Height, 0);
this.ownHandle = true;
}
finally
{
CodeAccessPermission.RevertAssert();
if (o != null)
{
Marshal.ReleaseComObject(o);
}
}
}
catch (COMException exception)
{
throw new ArgumentException(System.Windows.Forms.SR.GetString("InvalidPictureFormat"), "stream", exception);
}
}
public override object ConvertNativeToManaged(object nativeValue, Com2PropertyDescriptor pd)
{
if (nativeValue == null)
{
return(null);
}
System.Windows.Forms.UnsafeNativeMethods.IPicture target = (System.Windows.Forms.UnsafeNativeMethods.IPicture)nativeValue;
IntPtr handle = target.GetHandle();
if ((this.lastManaged == null) || (handle != this.lastNativeHandle))
{
this.lastNativeHandle = handle;
if (!(handle != IntPtr.Zero))
{
this.lastManaged = null;
this.pictureRef = null;
}
else
{
switch (target.GetPictureType())
{
case 1:
this.pictureType = typeof(Bitmap);
this.lastManaged = Image.FromHbitmap(handle);
break;
case 3:
this.pictureType = typeof(Icon);
this.lastManaged = Icon.FromHandle(handle);
break;
}
this.pictureRef = new WeakReference(target);
}
}
return(this.lastManaged);
}