How to disable the Tooltip when controls goes out of focus or pressing the ALT+Tab Key?

[EDN Admin]

Hi Everyone,
Am working on the windows Form application. In that I have one big issue. Tool tip of the particular control(say Text box) is not disabling when I press the ALT+tab key. First I set the Tooltip for the Text box as below code:
private void txtDomainName_MouseHover(object sender, EventArgs e)<br/>
{<br/>
this.ttDomainLevel.SetToolTipInfo(this.txtDomainName, "custom domains.");

}
Tool tip is showing correctly and when i move mouse out of control , it automatically disables the tool-tip. My problem is when mouse on the Control , Tool tip is showing, at that time i pressing the ALT+Tab Keys (to switch another application,
say e.g Ms-Word) , Tool tip is still showing in the Ms-Word also. because am not moving mouse , or changing mouse cursor to any other controls in the application. While tool tip showing , simply pressing the ALT+Tab key. Is there any solution
to disable the tool tip when switching application (or pressing ALT+Tab)?
Thanks in-advance.. <hr class="sig Manikandan Murugeshan

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