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Determines whether the specified user-defined window exists.
WEXIST(WindowName) |
Parameters
- WindowName
- Specifies the name of the user-defined window. You can also specify the name of a Visual FoxPro system window (the Command window, the Data Session window, a Browse window, and so on), and in Visual FoxPro, the name of a toolbar. WEXIST(В ) returns true (.T.) if the system window or toolbar you specify is visible or hidden. WEXIST(В ) returns false (.F.) if the specified system window or toolbar is closed. Two exceptions are the Command and Debug windows. Including the Command window's name in WEXIST(В ) always returns a true value. If the Debug window has been opened, WEXIST(В ) returns true, even if the Debug window is closed.
Return Value
Logical
Remarks
WEXIST(В ) returns true (.T.) if the user-defined window you specify has been created with DEFINE WINDOW; otherwise WEXIST(В ) returns false (.F.). The specified window does not have to be active or visible for WEXIST(В ) to return true (.T.), but it must exist.
Example
| В |  Copy Code |
|---|---|
DEFINE WINDOW wScreen1 FROM 10,10 TO 20,69
DEFINE WINDOW wScreen2 FROM 1,0 TO 19,79
CLEAR
? WEXIST('wScreen1') && Displays .T.
STORE 'wScreen2' TO gcWinName
? WEXIST('win_name') && Displays .F.
? WEXIST(gcWinName) && Displays .T.
RELEASE WINDOWS wScreen1, wScreen2 | |