>I have VFP9 and I want to change the toolbar Print Preview to insert my button with my class PDF. How to add a button and code in the toolbar of Fox?

1. Locate this path on your computer:
"C:\Program Files\Microsoft Visual FoxPro 9\Tools\xsource"
2. In this folder, you will find XSource.zip and unzip the ReportPreview folder to a desired place.
3. Then modify the ReportPreview project in VFP 9.
4. From the project manager, activate the class tab and locate frxpreview.vcx and expand it
5. The last class is the Toolbar that you want, it's named frxpreviewtoolbar
6. Import your class PDF lib into the project and add your button to this toolbar
7. Write appropriate code for you implementations
8. Build the project targeted to an APP file
9. set the _ReportPreview system variable to your new ReportPreview.app in VFP 9
10. Use it like this

do (_ReportPreview) with m.loPreview
with m.loPreview
	.CurrentPage      = 1	&& start with page 1
	.ToolbarIsVisible = .t.	&& display the toolbar
	.CanvasCount      = 2	&& display 2-up pages
	.ZoomLevel        = 4	&& set zoom to 75%
	.Width            = _screen.Width - 30
	.Caption          = 'My very own preview'
endwith

* Create the listener and tell it to use the preview window.

m.loListener = newobject('MyListener', ;
	'MyListenerLib.vcx')
m.loListener.OutputType = 1
m.loListener.PreviewContainer = m.loPreview
report form myreport.frx object loListener

HTH