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PBM_STEPIT


PBM_STEPIT 
    wParam = 0; 
    lParam = 0;

Advances the current position for a progress bar by the step increment and redraws the bar to reflect the new position. An application sets the step increment by sending the PBM_SETSTEP message.

When the position exceeds the maximum range value, this message resets the current position so that the progress indicator starts over again from the beginning.

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