_RetLogical( ) API Library Routine


void _RetLogical(int flag) int flag; /* Flag. */

_RetLogical( ) considers zero to be False, and any non-zero value to be True.

For more information on how to create an API library and integrate it with Visual FoxPro, see Accessing the Visual FoxPro API.

The following example is a coin flip. It returns .T. or .F. based on the library function RAND( ).

Visual FoxPro Code

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SET LIBRARY TO RETLOGIC ? RETLOGICAL() && returns .T. or .F. pseudo-randomly

C Code

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#include <pro_ext.h> FAR Example(ParamBlk FAR parm) { _RetLogical(rand() % 2); } FoxInfo myFoxInfo[] = { {"RETLOGICAL", (FPFI) Example, 0, ""}, }; FoxTable _FoxTable = { (FoxTable FAR ) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo };

Copy Code

#include <pro_ext.h>
FAR Example(ParamBlk FAR *parm)
{
   _RetLogical(rand() % 2);
}
FoxInfo myFoxInfo[] = {
   {"RETLOGICAL", (FPFI) Example, 0, ""},
};
FoxTable _FoxTable = {
   (FoxTable FAR *) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo
};

Reference

_RetChar( ) API Library Routine
_RetCurrency( ) API Library Routine
_RetDateStr( ) API Library Routine
_RetDateTimeStr( ) API Library Routine
_RetFloat( ) API Library Routine
_RetInt( ) API Library Routine
_RetVal( ) API Library Routine

Other Resources

API Library Construction

Remarks

Example

Visual FoxPro Code

C Code

See Also

Reference

Other Resources