Inno Setup: Uninstall user dialog

I need a user dialog with yes/no option for the uninstall process ("also delete the setting files in the userappdata开发者_高级运维 folder?" )!

How is this possible?

Thank you in advance!

greets

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You will need to create a custom form (CreateCustomForm()) or use a simple message box (MsgBox()) in the CurUninstallStepChanged(usUninstall) event function.