FUNCTION FindWindowA%& (BYVAL ClassName AS _OFFSET, WindowName$) 'find process h

[MLambert]

Hi,

FindWindowA%$ ..... what does the %$ mean appended the variable ?

Regards,

Mike

[bplus]

http://qb64.org/wiki/OFFSET
DECLARE CUSTOMTYPE LIBRARY
    FUNCTION FindWindow& (BYVAL ClassName AS _OFFSET, WindowName$)
END DECLARE

Only the ampersand & is present, no % sign!

& after variable name represents the long integer type variable often used for variable handles to access specially stored memory items like images or play files.

Oh hey! There is FindWindowA, example #2:
http://qb64.org/wiki/CLIPBOARD$

Code: QB64: [Select]

1. '"ClippyBoard" program uses GetKeyState Win API to monitor a specific key combination.
2. 'This demo will maximize the window and focus on program when Shift+A is pressed.
3.  
4. DECLARE DYNAMIC LIBRARY "user32"
5.   FUNCTION FindWindowA%& (BYVAL ClassName AS _OFFSET, WindowName$) 'find process handle by title
6.   FUNCTION GetKeyState% (BYVAL nVirtKey AS LONG) 'Windows virtual key presses
7.   FUNCTION ShowWindow& (BYVAL hwnd AS _OFFSET, BYVAL nCmdShow AS LONG) 'maximize process
8.   FUNCTION GetForegroundWindow%& 'find currently focused process handle
9.   FUNCTION SetForegroundWindow& (BYVAL hwnd AS _OFFSET) 'set foreground window process(focus)
10. END DECLARE
11.  
12.  

typo?

maybe a screwy way for unsigned long? ~&

or maybe a Windows type:
http://qb64.org/wiki/Windows_Libraries
right at beginning

[FellippeHeitor]

typo?

Does it work?

[bplus]

No errors thrown so probably a Window type?

[FellippeHeitor]

Type of prefix %& is _OFFSET, as you pointed out: http://qb64.org/wiki/OFFSET

[bplus]

Code: QB64: [Select]

1. '"ClippyBoard" program uses GetKeyState Win API to monitor a specific key combination.
2. 'This demo will maximize the window and focus on program when Shift+A is pressed.
3.  
4. DECLARE DYNAMIC LIBRARY "user32"
5.     FUNCTION FindWindowA%& (BYVAL ClassName AS _OFFSET, WindowName$) 'find process handle by title
6.     FUNCTION GetKeyState% (BYVAL nVirtKey AS LONG) 'Windows virtual key presses
7.     FUNCTION ShowWindow& (BYVAL hwnd AS _OFFSET, BYVAL nCmdShow AS LONG) 'maximize process
8.     FUNCTION GetForegroundWindow%& 'find currently focused process handle
9.     FUNCTION SetForegroundWindow& (BYVAL hwnd AS _OFFSET) 'set foreground window process(focus)
10. END DECLARE
11.  
12. title$ = "Clippy Clipboard (Ctrl+Shift)" 'title of program window
13. _TITLE title$ 'set program title
14. hwnd%& = FindWindowA(0, title$ + CHR$(0)) 'find this program's process handle
15.  
16. IF hwnd%& <> 0 THEN PRINT "Worked" ELSE PRINT "Did not work"
17.  
18.  

So what do you think I got "Worked" or "Did not work"?

[bplus]

Oh there is an _OFFSET type with %& suffix
http://qb64.org/wiki/Variable_Types

There is even an unsigned offset ~%&

[bplus]

Maybe _OFFSET type can't be printed with a value other than 0?

[FellippeHeitor]

Oh there is an _OFFSET type with %& suffix
http://qb64.org/wiki/Variable_Types

That’s what I meant when I said

Type of prefix %& is _OFFSET, as you pointed out: http://qb64.org/wiki/OFFSET

Anyway, QB64 can now give you the current window handle with _WINDOWHANDLE, no need for FindWindow.

[bplus]

oops, dang I thought i was editing a previous reply

[bplus]

Where is my modify button?

EDIT: on previous posts?

[bplus]

Fellippe, I think you are meaning suffix, %& is a suffix for the _OFFSET type, a prefix comes before then main word. Like _ in _OFFSET

And yes, it completely slipped my understanding that there was a type called _OFFSET.

And, it is handy to know that function has been replaced with Keyword.

EDIT: AND, apparently there is a time limit for how long you are allowed to modify a post.

[bplus]

See it would be nice if I could edit  "then" to "the" in the above post.

I really think MODIFY functions have been modified, a shorter time limit.

Now the folks here have to suffer my poor typing skills... no Ninja fingers here...

[FellippeHeitor]

I did mean suffix.

[MLambert]

Hi Everyone,

Thks for the feedback.

I don't understand many of the threads..

So is hwnd%&  ... "%&" valid ?

Mike