Changing color of toggle button, when toggled in gtk

[RTD <d_ravu yahoo com>]

Hi Everybody,

        I am new to gtk-development and facing
problem while changing the button color , when the
button is toggled. I want to make the background color
of the button so darker that it shows toggled state is
active.
  	So how can I change the background color for 
toggled button, wheb it is toggled.

ok bye.....

Waiting for reply....................

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