Hello Michael,

Yes, you can define ButtonStyle using CSS class.

For example, let's say you have the stylesheet classes as in the following:

<style>
.Button-Normal
{
    border: Gray 2px solid;
    background-color: White;
}
</style>

You can assign the class to the Normal style of the WebButton through the object model, such as shown below:

button.ButtonStyle.Normal.CssClass = "Button-Normal";

Note that you can also assign it declaratively in the ASPX markup. 

Hope this helps,
James.

Hi

I have find out, how can I define Backcolor2 and GradienType:

ctl00ContentPlaceHolder1WebDesktopManager1-TaskBarButtonStyle-Active{background-color:WhiteSmoke; font-family:Tahoma;  font-size:8pt;  font-weight:normal;border:1px Gray solid;border-right: 1px White solid;border-bottom: 1px White solid;cursor:Default;filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#FFF5F5F5 , endColorstr=#FFD3D3D3, GradientType=0);width:150px;basestyle:Normal;}

I have read Performace Guidelines. It's recommended to use Theme architecture.

But how can I use Theme architecture? A sample would be great!