Sunny,

You can put the code in the textbox.Refresh() method.

this.ForeColor = iif( this.Value < 0, rgb(255,0,0), rgb(0,0,0) )
this.BackColor = ...

>I want to change the textbox's color to alter the user when skipping records. For example, the normal color of 'profit'(txtbox) is black in white. The user click the [NEXT] button again and again to find the negative value of 'profit'. Sometimes, the user may miss the target but changing the txtbox's color (eg. red in white) can alter the user.