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 Purpose  | 
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 Syntax  | 
 wParam& = CBWPARAM  | 
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 Remarks  | 
 When Windows sends a message to your Callback Function, the value of the wParam& parameter will depend on the wMsg& command sent. See Dynamic Dialog Tools for more information on callbacks and messages.  | 
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 Restrictions  | 
 This function is only valid inside a Callback Function.  | 
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 See also  | 
 Dynamic Dialog Tools, CBCTL, CBCTLMSG, CBHNDL, CBMSG, CBLPARAM  |