EMR_DELETEOBJECT           = 40,

static extern bool DeleteObject(IntPtr hObject);

    DeleteObject(pNew);

static extern bool DeleteObject(IntPtr hObject);

After you're done, you should use DeleteObject to release resources.

If you call this and then exit the function, automatic garbage collection does not work and you get a memory leak. You will need the DeleteObject function (also in gdi32) to free the memory manually

    DeleteObject(SelectObject(pDC, oldpen));

        static extern bool DeleteObject(IntPtr hObject);

                DeleteObject(brush);

Please call DeleteObject to free up all system resources.

        static extern bool DeleteObject(IntPtr hObject);

                DeleteObject(brush);

[DllImport("gdi32.dll", EntryPoint = "DeleteObject")]

public static extern bool DeleteObject([In] IntPtr hObject);

Private Shared Function DeleteObject(hObject As IntPtr)  As <MarshalAs(UnmanagedType.Bool)> Boolean

Public Declare Function DeleteObject Lib "gdi32.dll" _

Call DeleteObject on a HBitmap object after using the GDI+ function:

FromHbitmap transfers a copy of the image bytes into returned Bitmap so it is important to call DeleteObject on the HBitmap to prevent two copies of the image from existing in the system.

public static extern bool DeleteObject(IntPtr hObject);

    DeleteObject(vBrush);

        static extern bool DeleteObject(IntPtr hObject);

                DeleteObject(brush);

     DeleteObject(hFont);

Release the handle after usage with the method DeleteObject in gdi32.dll.

    private static extern bool DeleteObject(IntPtr hgdiobj);

            DeleteObject(fontHandle);

    GDI.DeleteObject(GDI.SelectObject(hdc, oldfnt));

    GDI.DeleteObject(GDI.SelectObject(hdc, oldfnt));

     DeleteObject(hFont);

static extern bool DeleteObject(IntPtr hdc);

      Win32::DeleteObject(hFont);

    DeleteObject(SelectObject(pDC, oldpen));

    DeleteObject(SelectObject(pDC, oldpen));

    public static extern bool DeleteObject(IntPtr hObject);

        GDI32.DeleteObject(thePen);

        GDI32.DeleteObject(theBrush);

DeleteObject(hRegion);

    public static extern int DeleteObject(int hBitmap);

DeleteObject(hPen);

                DeleteObject(pNew);

        static extern bool DeleteObject(IntPtr hObject);

   public static extern bool DeleteObject(IntPtr objectHandle);

        DeleteObject(SelectObject(HDC, last_font));

    Private Shared Function DeleteObject(ByVal objectHandle As IntPtr) As Boolean

            DeleteObject(FontPtr)

                Gdi.DeleteObject(disposeFontH);

public static extern bool DeleteObject(IntPtr hObject);

     DeleteObject(imgHandle);

public static extern bool DeleteObject(IntPtr hObject);

     DeleteObject(imgHandle);

        if (ii.hbmColor != IntPtr.Zero) DeleteObject(ii.hbmColor);

        if (ii.hbmMask != IntPtr.Zero) DeleteObject(ii.hbmMask);

    [DllImport("gdi32.dll", EntryPoint = "DeleteObject")]

    static extern IntPtr DeleteObject(IntPtr hDc);

                Win32.DeleteObject(hBitmap);

        public extern static Bool DeleteObject(IntPtr hObject);

    //     member is null, the destination process should use DeleteObject to delete

    '     member is null, the destination process should use DeleteObject to delete

     FsctlDeleteObjectId = (EFileDevice.FileSystem << 16) | (40 << 2) | EMethod.Buffered | (0 << 14),