The Return Value of the actievx control attribute is always true.

Symptom: When the attribute of the actievx control is variant_bool, the return value of get is always true on the client.

Cause: the MFC is converted during the transfer process, but the variant_boo is short type. The MFC is indeed converted to DWORD, so the conversion is always true. (For details, see the 1100 rows in oledisp1.cpp under vc2003 ). Method: Set the return value of "get" to "DWORD.

In addition, set values are different from those of variant_true and variant_false,

Correct use is shown in the following example:

Declaration: DWORD getflat1 (void );

Void setflat1 (variant_bool newval );

Definition: DWORD cbuttonst1ctrl: getflat1 (void)

{

Afx_manage_state (afxgetstaticmodulestate ());

// Todo: add the scheduling handler code here

If (m_bisflat)

{

Return variant_true;

}

Else

{

Return variant_false;

}

}

 

Void cbuttonst1ctrl: setflat1 (variant_bool newval)

{

Afx_manage_state (afxgetstaticmodulestate ());

// Todo: add the property handler code here

If (newval = 1)

{

M_bisflat = true;

}

If (newval = 0)

{

M_bisflat = false;

}

Invalidatecontrol ();

Setmodifiedflag ();

}