Maintain global leave count on form. And increment it in textbox leave event and check count. 1. Declare global count in class as int count=0; 2. In textbox leave event write below code count++; if(count==2) { MessageBox.Show(""); } If it helps you select as correct answer.

Textbox has a leave event, check this link for more info: http://www.homeandlearn.co.uk/csharp/csharp_s9p4.html You could use a global variable to count how many times it gets fired.

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how to do 2nd time leave textbox show messagebox

Mark Mashup

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1 Deployment

please help me

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