C# Signature:

/// <summary>Deletes a logical pen, brush, font, bitmap, region, or palette, freeing all system resources associated with the object. After the object is deleted, the specified handle is no longer valid.</summary>
/// <param name="hObject">A handle to a logical pen, brush, font, bitmap, region, or palette.</param>
/// <returns>
///   <para>If the function succeeds, the return value is nonzero.</para>
///   <para>If the specified handle is not valid or is currently selected into a DC, the return value is zero.</para>
/// </returns>
/// <remarks>
///   <para>Do not delete a drawing object (pen or brush) while it is still selected into a DC.</para>
///   <para>When a pattern brush is deleted, the bitmap associated with the brush is not deleted. The bitmap must be deleted independently.</para>
/// </remarks>
[DllImport("gdi32.dll", EntryPoint = "DeleteObject")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool DeleteObject([In] IntPtr hObject);

VB.Net Signature:

<DllImport("gdi32.dll")> _
Private Shared Function DeleteObject(hObject As IntPtr)  As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

VB Signature:

Public Declare Function DeleteObject Lib "gdi32.dll" _
          (ByVal hObject As Long) As Long

User-Defined Types:

None.

Notes:

None.

Tips & Tricks:

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

[C#]
public static Bitmap FromHbitmap(
    IntPtr hbitmap
);

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.

Sample Code:

Please see BitBlt

Alternative Managed API:

Do you know one? Please contribute it!