In the Form Designer when creating a ToolBar with image there appears to be no properties option to enter the optional text to display with ToolBarImageButton()
From the help file
And obviously if you manually edit the form code to add the text then need to make other changes in the form designer, your text is wiped out!ToolBarImageButton()
Syntax
ToolBarImageButton(#Button, ImageID [, Mode [, Text$]])
Description
Add an image button to the toolbar being constructed. CreateToolBar() must be called before to use this function.
Parameters
#Button The new toolbar button identifier.
ImageID The image to use for the button. It can be easily obtained by using ImageID() from the Image library. It can be an image loaded with LoadImage() or created in memory with CreateImage(). To have a real transparent background, use the 'icon' (.ico) file format on Windows, or the PNG file format on Linux/MacOS X.
Mode (optional) The mode value can be one of the following constants:
#PB_ToolBar_Normal: the button will act as standard button (default)
#PB_ToolBar_Toggle: the button will act as toggle button
GetToolBarButtonState() and SetToolBarButtonState() can be used to retrieve or modify a toggle button state.
Text$ (optional) The text to display with this button. The toolbar has to be created with the #PB_ToolBar_Text flag, or the text won't be displayed.