private Image GetNativeMenuItemImage()
{
if ((this.nativeMenuCommandID == -1) || (this.nativeMenuHandle == IntPtr.Zero))
{
return(null);
}
System.Windows.Forms.NativeMethods.MENUITEMINFO_T_RW lpmii = new System.Windows.Forms.NativeMethods.MENUITEMINFO_T_RW {
fMask = 0x80,
fType = 0x80,
wID = this.nativeMenuCommandID
};
System.Windows.Forms.UnsafeNativeMethods.GetMenuItemInfo(new HandleRef(this, this.nativeMenuHandle), this.nativeMenuCommandID, false, lpmii);
if ((lpmii.hbmpItem != IntPtr.Zero) && (lpmii.hbmpItem.ToInt32() > 11))
{
return(Image.FromHbitmap(lpmii.hbmpItem));
}
int num = -1;
switch (lpmii.hbmpItem.ToInt32())
{
case 2:
case 9:
num = 3;
break;
case 3:
case 7:
case 11:
num = 1;
break;
case 5:
case 6:
case 8:
num = 0;
break;
case 10:
num = 2;
break;
}
if (num <= -1)
{
return(null);
}
Bitmap image = new Bitmap(0x10, 0x10);
using (Graphics graphics = Graphics.FromImage(image))
{
ControlPaint.DrawCaptionButton(graphics, new Rectangle(Point.Empty, image.Size), (CaptionButton)num, ButtonState.Flat);
graphics.DrawRectangle(SystemPens.Control, 0, 0, image.Width - 1, image.Height - 1);
}
image.MakeTransparent(SystemColors.Control);
return(image);
}