c# Search specified string inside textbox
int pos = textbox1.Text.IndexOf("YYMM");
if(pos != -1)
{
textbox1.SelectionStart = pos;
textbox1.SelectionLength = 4;
// MessageBox("Error");
}c# Search specified string inside textbox
int pos = textbox1.Text.IndexOf("YYMM");
if(pos != -1)
{
textbox1.SelectionStart = pos;
textbox1.SelectionLength = 4;
// MessageBox("Error");
}Copyright © 2021 Codeinu
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