Sets the text of the label of the button to @str. This text is also used to select the stock item if gtk_button_set_use_stock() is used.
This will also clear any previously set labels.
a string
See Implementation
Sets the text of the label of the button to @str. This text is also used to select the stock item if gtk_button_set_use_stock() is used.
This will also clear any previously set labels.