windowexists_validate_window_existence_.htm
| Navigation: Advanced Topics > Clarion Language Utilities >====== WindowExists (Validate Window Existence) ====== |    |
WINDOWEXISTS(windowtitle )
| WINDOWEXISTS | Verify that a WINDOW structure is active |
| windowtitle | A string constant or variable that specifies the window name (the window's title). |
WINDOWEXISTS is used to verify that a valid window exists whose window name matches the window title.
If WINDOWEXISTS succeeds (has a valid handle), the return value is TRUE (1).
If it fails, the return value is FALSE (0).
To add support for this utility to your existing applications, you need only include the CWUTIL.INC file in the Global Map section of your program:
INCLUDE('CWUTIL.INC'),ONCE
Return Data Type: BYTE
Example:
GLO:IsMenuActive = WINDOWEXISTS('Utility Menu') !is the utility window active?
windowexists_validate_window_existence_.htm.txt · Last modified: 2021/04/15 15:57 by 127.0.0.1