PickBASIC / FlashBASIC

uwaitfor command

The uwaitfor command causes the process to wait until the Windows application, identified by the var variable, terminates or the time specified by the expr variable elapses.

Format

 
 UWAITFOR var, expr THEN statement(s) ELSE statement(s)

Parameters


`var`	Must be an identifier returned by the uexecute command.
`expr`	Indicates time, in 1/100th seconds.
THEN/ELSE statements	If the uwaitfor command time expires, the ELSE clause is executed. If the application terminates, the THEN clause is executed.

Example(s)

Example 1

 *
 * Launch Notepad; Allow user 3 seconds to
 * Complete edit. If not done in 3 seconds
 * Close application for them.
 *
 UEXECUTE "NOTEPAD.EXE" RETURNING HANDLE
 UWAITFOR HANDLE, 300 ELSE
   UMESSAGE TO HANDLE,16,0,""
 END

Example 2

Running the following program will close Notepad.exe after 5 seconds:

 001 UEXECUTE "NOTEPAD.EXE" RETURNING HANDLE
 002
 003 UWAITFOR HANDLE, 500 THEN
 004 __PRINT "THANKS FOR WAITING"
 005 END ELSE
 006 __UMESSAGE TO HANDLE,16,0,""
 007 END

See also

O/S interoperability commands and functions→uclose command→ucreate command→udelete command→uerror() function→uexecute command→ulock command→ulseek() function→umessage command→uopen command→uread command→ureadline() function→usystem() function→uwrite command→