Thanks. I'm using Tk module, not Tcl:Tk, do you think it will still work? Seams strange that such a comon and widely used feature was not implemented. Probably I'm doing something wrong? I need to initialize some resource ( let's say open a file ) and I want to notify user in case of error by message box and not by printing message. It means I have to run GUI main loop prior to poping up the message box. I though to put inititalization code in onCreate handler and be able to make some GUI communication with user if I have a problems.

Thanks.

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# Dimax USB to I2C/SPI/GPIO Adapter
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