Kbase P111265: Is is possible to know from the 4GL whether the Shift key was pressed during a mouse event?
| Autor |
Progress Software Corporation - Progress |
| Acesso |
Público |
| Publicação |
16/10/2008 |
|
Status: Unverified
GOAL:
Is is possible to know from the 4GL whether the Shift key was pressed during a mouse event?
FIX:
Not directly.
Under Windows, it's possible to invoke the Win32 API GetKeyState() function from within a 4GL trigger. For example:
ON MOUSE-SELECT-CLICK OF <widget phrase>
DO:
&GLOBAL-DEFINE VK_SHIFT 16
DEFINE VARIABLE liState AS INTEGER NO-UNDO.
RUN GetKeyState({&VK_SHIFT},OUTPUT liState).
IF liState < 0 THEN DO:
MESSAGE "Shift is pressed" VIEW-AS ALERT-BOX.
END.
END.
PROCEDURE GetKeyState EXTERNAL "USER32.DLL":
DEFINE INPUT PARAMETER intVirtKey AS LONG.
DEFINE RETURN PARAMETER intResult AS SHORT.
END PROCEDURE.