_WOpen( ) API Library Routine


WHANDLE _WOpen(int top, int left, int bottom, int right, int flag, int scheme_num, Scheme FAR scheme, char FAR bord) int top; /* Row of top coordinate. / int left; / Column of left coordinate. / int bottom; / Row of bottom coordinate. / int right; / Column of right coordinate. / int flag; / Attributes. / int scheme_num; / Color scheme. / Scheme FAR scheme; /* Points to color scheme to use. / char FAR bord; /* Border type. */

WHANDLE _WOpen(int top, int left, int bottom, int right, int flag, 
         int scheme_num, Scheme FAR *scheme, char FAR *bord)
int top;                     /* Row of top coordinate. */
int left;                     /* Column of left coordinate. */
int bottom;                  /* Row of bottom coordinate.  */
int right;                     /* Column of right coordinate. */
int flag;                     /* Attributes. */
int scheme_num;            /* Color scheme. */
Scheme FAR *scheme;      /* Points to color scheme to use. */
char FAR *bord;            /* Border type. */

The window coordinates may be off the screen, but the height can't exceed 120 and the width can't exceed 264. Additional memory is allocated to hold the off-screen image of this window.

The flag parameter determines the attributes for this window. The flag may be one or more of the following flag values. You can combine multiple flag values using the C-language | or + operator. Typical window borders are defined in PRO_EXT.H.

flag Value	Window attribute
WCURSOR	The insertion point may be displayed in this window.
ZOOM	The user may zoom the window.
ADJ	The user may adjust the size of the window.
CLOSE	The user may close the window.
MOVE	The user may move the window.
AUTOSCROLL	The window scrolls when output rolls off the bottom line.
WEVENT	The window receives, activates, and deactivates events.
SHADOW	The window casts a shadow.
WMODAL	The user can't send this window to the back.
WMINIMIZE	The user can minimize this window.

The scheme_num may be any valid color scheme number, or – 1 to indicate that the scheme parameter points to the color scheme to use.

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 windows using a number of different color schemes and borders. In particular, note the custom color scheme.

Visual FoxPro Code

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SET LIBRARY TO WOPEN

C Code

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#include <pro_ext.h> FAR Example(ParamBlk FAR parm) { WHANDLE wh; Scheme customScheme = { (char) (BLACK_ON \| WHITE), (char) (RED_ON \| BLACK \| BLINK), (char) (WHITE_ON \| WHITE \| BRIGHT), (char) (CYAN_ON \| BLUE \| BRIGHT), (char) (GREEN_ON \| BROWN), (char) (BROWN_ON \| BROWN \| BRIGHT), (char) (MAGENTA_ON \| MAGENTA \| BRIGHT), (char) (RED_ON \| MAGENTA \| BRIGHT \| BLINK), (char) (BROWN_ON \| GREEN \| BRIGHT), (char) (BLACK_ON \| CYAN), (char) (BLUE_ON \| CYAN), }; _Execute("WAIT WINDOW 'Press any key to see a window \ in WINDOW_SCHEME with WO_DOUBLEBOX border'"); wh = _WOpen(2,2,20,70,WEVENT \| CLOSE,WINDOW_SCHEME,(Scheme FAR ) 0, WO_DOUBLEBOX); _WShow(wh); _Execute("WAIT WINDOW 'Press any key to see a window \ in ALERT_SCHEME with WO_SINGLEBOX border'"); _WClose(wh); wh = _WOpen(2,2,20,70,WEVENT \| CLOSE,ALERT_SCHEME, (Scheme FAR ) 0, WO_SINGLEBOX); _WShow(wh); _Execute("WAIT WINDOW 'Press any key to see a window \ in WINDOW_SCHEME with WO_PANELBORDER border'"); _WClose(wh); wh = _WOpen(2,2,20,70,WEVENT \| CLOSE,WINDOW_SCHEME,(Scheme FAR ) 0, WO_PANELBORDER); _WShow(wh); _Execute("WAIT WINDOW 'Press any key to see a window \ in a custom scheme with WO_SYSTEMBORDER border'"); _WClose(wh); wh = _WOpen(2,2,20,70,WEVENT \| CLOSE,-1,(Scheme FAR ) customScheme, WO_SYSTEMBORDER); _WShow(wh); FoxInfo myFoxInfo[] = { {"ONLOAD", (FPFI) Example, CALLONLOAD, ""}, }; FoxTable _FoxTable = { (FoxTable FAR ) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo };

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#include <pro_ext.h>
FAR Example(ParamBlk FAR *parm)
{
   WHANDLE wh;
   Scheme customScheme =
   {
      (char) (BLACK_ON      | WHITE),
      (char) (RED_ON      | BLACK      | BLINK),
      (char) (WHITE_ON      | WHITE      | BRIGHT),
      (char) (CYAN_ON      | BLUE      | BRIGHT),
      (char) (GREEN_ON      | BROWN),
      (char) (BROWN_ON      | BROWN      | BRIGHT),
      (char) (MAGENTA_ON   | MAGENTA   | BRIGHT),
      (char) (RED_ON      | MAGENTA   | BRIGHT | BLINK),
      (char) (BROWN_ON      | GREEN      | BRIGHT),
      (char) (BLACK_ON      | CYAN),
      (char) (BLUE_ON      | CYAN),
   };
   _Execute("WAIT WINDOW 'Press any key to see a window \
      in WINDOW_SCHEME with WO_DOUBLEBOX border'");
   wh = _WOpen(2,2,20,70,WEVENT | CLOSE,WINDOW_SCHEME,(Scheme FAR *) 0,
      WO_DOUBLEBOX);
   _WShow(wh);
   _Execute("WAIT WINDOW 'Press any key to see a window \
      in ALERT_SCHEME with WO_SINGLEBOX border'");
   _WClose(wh);
   wh = _WOpen(2,2,20,70,WEVENT | CLOSE,ALERT_SCHEME, (Scheme FAR *) 0,
      WO_SINGLEBOX);
   _WShow(wh);
   _Execute("WAIT WINDOW 'Press any key to see a window \
      in WINDOW_SCHEME with WO_PANELBORDER border'");
   _WClose(wh);
   wh = _WOpen(2,2,20,70,WEVENT | CLOSE,WINDOW_SCHEME,(Scheme FAR *) 0,
      WO_PANELBORDER);
   _WShow(wh);
   _Execute("WAIT WINDOW 'Press any key to see a window \
      in a custom scheme with WO_SYSTEMBORDER border'");
   _WClose(wh);
   wh = _WOpen(2,2,20,70,WEVENT | CLOSE,-1,(Scheme FAR *) customScheme,
      WO_SYSTEMBORDER);
   _WShow(wh);
FoxInfo myFoxInfo[] = {
   {"ONLOAD", (FPFI) Example, CALLONLOAD, ""},
};
FoxTable _FoxTable = {
   (FoxTable FAR *) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo
};

Reference

_WClose( ) API Library Routine
_WSelect( ) API Library Routine
_WSetTitle( ) API Library Routine
_WShow( ) API Library Routine

Other Resources

API Library Construction
Accessing the Visual FoxPro API

Remarks

Example

Visual FoxPro Code

C Code

See Also

Reference

Other Resources