This is the code i am using:
<ToolboxBitmap(GetType(Button), "C:\icon.bmp")> Class ToolBarIcon
End Class

Public Class Statusbar
Inherits System.Windows.Forms.UserControl
.....

This is the error:
An error occurred while loading the document. Fix the error, and they try loading the document again. The error message follows:

The class Statusbar can be designed, but is not the first class in the file. Visual Studio requires that designers use the first class in the file and try loading the designer again.