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MiniRobotLanguage (MRL)
IEW. Conditional Statement
If Exist Window
Intention
Conditional Statement. Test if one or more (up to 20) a specified window handle(s) is valid or not. A window handle is valid until the corresponding window has been closed (destroyed).
IEW. tells you, if the actual window is still available or has been closed.
If no parameter is given, the actual window is been tested. If you give parameter, these must be window handles, or the letters "c" or "t".
These letters stand for "child" and "Top". If given they will be replaced with the last window of that kind that has been localized.
c - last localized child-window
t - last localized Top-Window
Please note, that if the actual window is a child-window (e.g. a button), you need to specify "t" as parameter,if you want to test the actual top-window. Some examples:
'Get first window handle
STW.ct|CabinetWClass|F:\00_RPGM
HTV.$$HAA
'Get second window handle
STW.ct|Chrome_WidgetWin_0|meebo.com
HTV.$$HAB
'Test both handles
IEW.$$HAA|$$HAB
DBP.All windows are alive
ELS.
DBP.At least one of the windows is history
EIF.
ENR.
Other modes of operation are:
' Check actual located window
IEW.
' check last located child window
IEW.c
' check actual Top-window
IEW.t
' check window with handle in $$MYH
IEW.$$MYH
NEW. is the negative version "Not Exist Window".
Syntax
IEW.P1[..|Px] … ELS. … EIF.
Parameter Explanation
P1 - numeric or "c" or "t". Can be Variable that contains a window handle. If omitted actual window is taken. You can also use these letters:
c - last localized child-window
t - last localized Top-Window
If you add multiple handles, they are AND'ed with IEW. If ANY of the given handles is invalid, the instruction will fail.
If you give multiple handles with NEW. (negative form of the command), the opposite will happen. If all of the given handles are valid, the instruction will fail.
IEW.'s can be nested to unlimited Depth, and they can also enclose Sub-Program Calls or FEX. (Enumerations) to unlimited Depth.
Speed in Ticks:
This command uses typically around 290 Ticks.
Example
'***********************************
' IEW./NEW.-Sample
'***********************************
STW.t|Sample
MMV.
IEW.
MBX.Ok
ELS.
MBX.Diabled!
EIF.
END.
Remarks
-
Limitations:
-
See also:
• 1.8. Selecting the Application (Topwindow)