_EdActive( ) API Library Routine Example

The following example opens an edit window for a file whose name is passed as a parameter and selects the first character in the file. Using _EdActive( ), the example activates and then deactivates the selection.

Visual FoxPro Code

SET LIBRARY TO EDACTIVE
fc = FCREATE("x", 0)
FOR i = 1 TO 90
   = FPUTS(fc, REPL(ALLT(STR(i)), i), i)
ENDFOR
= FCLOSE(fc)

= EDACTIVE("x")   && Call our API routine

C Code

#include <pro_ext.h>

FAR EdActiveEx(ParamBlk FAR *parm)
{
#define pFILENAME ((char FAR *) _HandToPtr(parm->p[0].val.ev_handle))

   WHANDLE wh;

   if (!_SetHandSize(parm->p[0].val.ev_handle,
      parm->p[0].val.ev_length+1))
   {
      _Error(182); // "Insufficient memory"
   }
   _HLock(parm->p[0].val.ev_handle);
   pFILENAME[parm->p[0].val.ev_length] = '\0';
   wh = _EdOpenFile(pFILENAME, FO_READONLY);
   _HUnLock(parm->p[0].val.ev_handle);

   _EdSelect(wh, 0, 1);

   _EdActive(wh, TRUE);
   _Execute("WAIT WINDOW 'Selection active'");

   _EdActive(wh, FALSE);
   _Execute("WAIT WINDOW 'Selection inactive'");
}

FoxInfo myFoxInfo[] = {
   {"EDACTIVE", (FPFI) EdActiveEx, 1, "C"},
};
FoxTable _FoxTable = {
   (FoxTable FAR *) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo
};