How to catch form activating

The example demonstrates how to catch form activating

Zip package for C# download file
Zip package for VB.NET download file
File name: ActivateHandlingPage_KB001download file
File name: ActivateHandlingPage.csdownload file
File name: ActivateHandlingPage.vbdownload file
File name: ActivateHandlingPage.designer.csdownload file
File name: ActivateHandlingPage.designer.vbdownload file
File name: ActivateHandlingPage.resxdownload file
File name: ActivatingForm.csdownload file
File name: ActivatingForm.vbdownload file
File name: ActivatingForm.designer.csdownload file
File name: ActivatingForm.designer.vbdownload file
File name: ActivatingForm.resxdownload file