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Erases the contents of the specified window by changing the content area to the default background color.

void _WClear(WHANDLE wh)
WHANDLE wh;            /* Window handle. */


The logical cursor position is unchanged.

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 creates a window and fills it with Xs. When the user presses a key in response to a Visual FoxPro WAIT command, _WClear(В ) clears the window.

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C Code

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#include <pro_ext.h>

FAR WClearEx(ParamBlk FAR *parm)
   WHANDLE wh;
   int row, col;

   wh = _WOpen(2,2,20,70,WEVENT | CLOSE,WINDOW_SCHEME,(Scheme FAR *) 0,

   for (row = 0; row < _WHeight(wh); row++)
      for (col = 0; col < _WWidth(wh); col++)
         _WPutChr(wh, 'X');
      _WPutChr(wh, '\n');
   _Execute("WAIT WINDOW 'Press any key to clear window'");

FoxInfo myFoxInfo[] = {
   {"ONLOAD", (FPFI) WClearEx, CALLONLOAD, ""},
FoxTable _FoxTable = {
   (FoxTable FAR *) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo

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JavaScript Editor js editor     Web development