How to change the image button size during runtime

VB.NET

Dim x As New Unit('80px')
Dim y As New Unit('20px')
Dim imagestate as string= 'stand'
If imagestate = 'stand' then
	imagebutton1.height = x
else
	imagebutton1.height = y
end if

C#

Unit x = new Unit ('80px');
Unit y = new Unit('20px');
string imagestate='stand';
if( imagestate != 'stand')
{
	ImageButton1.Height = x;
}
else
{
	ImageButton1.Height = y;
}

For more details Setting Web Server Control Properties Programmatically