To define the images to be used on a toolbar button, use the SetBitmaps and GetBitmaps methods.
SmallIconName and LargeIconName.
The SetBitmaps method takes two parameters:The small icon name identifies the ID string of the small-image resource (16W15 bitmap). The string must comprise alphanumeric characters with no punctuation other than a dash (-) or an underscore (_), and should include the .bmp extension. The resource can be either a system bitmap or a user-defined bitmap. User-defined bitmaps must be of the appropriate size and must reside in the Support path.
The large icon name identifies the ID string of the large-image resource (24W22 bitmap). The string must comprise alphanumeric characters with no punctuation other than a dash (-) or an underscore (_), and should include the .bmp extension. The resource can be either a system bitmap or a user-defined bitmap. User-defined bitmaps must be of the appropriate size and must reside in the Support path.
Query an existing toolbar to find the name of the icons for the buttons
Sub Ch6_GetButtonImages()
Dim Button As AcadToolbarItem
Dim Toolbar0 As AcadToolbar
Dim MenuGroup0 As AcadMenuGroup
Dim SmallButtonName As String
Dim LargeButtonName As String
Dim msg As String
Dim ButtonType As String
' Get the first toolbar in the first menu group
Set MenuGroup0 = ThisDrawing.Application. _
MenuGroups.Item(0)
Set Toolbar0 = MenuGroup0.Toolbars.Item(0)
' Clear the string variables
SmallButtonName = ""
LargeButtonName = ""
' Create a header for the message box and
' display the toolbar to be queried
msg = "Toolbar: " + Toolbar0.Name + vbCrLf
Toolbar0.Visible = True
' Iterate through the toolbar and collect data
' for each button in the toolbar. If the toolbar is
' a normal button or a flyout, collect the small
' and large button names for the button.
For Each Button In Toolbar0
ButtonType = Choose(Button.Type + 1, "Button", _
"Separator", "Control", "Flyout")
msg = msg & ButtonType & ": "
If Button.Type = acToolbarButton Or _
Button.Type = acToolbarFlyout Then
Button.GetBitmaps SmallButtonName, _
LargeButtonName
msg = msg + SmallButtonName + ", " _
+ LargeButtonName
End If
msg = msg + vbCrLf
Next Button
' Display the results
MsgBox msg
End Sub