about datagridview columns header width

Question

hello ,
 i am using C# window form application and my problem is :
 i am adding grid view columns header names and its width through code, which is implemented in a method and call  this method in a form_load event.
now problem is, when i call this window form, grid columns header does not display in correct manner(i.e the specified column width manner(srinked)) and again if i upload this grid at button click event then it display with correct column width.
if any body have an idea regarding this problem, please reply me.