TB_INDETERMINATE


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TB_INDETERMINATE
TB_INDETERMINATE 
    wParam = (WPARAM) idButton; 
    lParam = (LPARAM) MAKELONG(fIndeterminate, 0); 
Sets or clears the indeterminate state of the specified button in a toolbar.
Returns TRUE if successful, or FALSE otherwise.

idButton
Command identifier of the button whose indeterminate state is to be set or cleared.
fIndeterminate
Indeterminate flag. If this parameter is TRUE, the indeterminate state is set. If it is FALSE, the state is cleared.

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