How to deal with callback function in MFC C++ ?

by yan (1 Submission)
Category: Windows API Call/Explanation
Compatability: VB 6.0
Difficulty: Unknown Difficulty
Originally Published: Mon 28^th January 2002
Date Added: Mon 8^th February 2021
Rating: (1 Votes)

API Declarations
Declare Function A Lib "Sekure" Alias "_A@8" (ByVal iPort As Integer, vFunc As Variant) As Integer

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//global declaration
typedef void (*FINGER_STATUS) (short);
FINGER_STATUS FingStatus = NULL;

SEKURE_API int __stdcall int A (int comport, void *fnc)
{
 FingStatus = (FINGER_STATUS)pFS;
 int nRet = GetInfo(comport);
 
 if (nRet) {
 if(FingStatus) 
 FingStatus( nRet );
 }
 return OK;
......
}

in VB =>
Public Sub Verify()
   Msgbox "HI"
   ..........
End Sub

Private Sub A_Click()
    ret= A(1, AddressOf Verify)
......
End Sub

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