ComboBox and CONTROL GET TEXT

[Mike Trader]

I have been using
DIM a$
COMBOBOX GET TEXT hDlg, 301 TO a$
up untill now. I can create the ComboBox, Add items to it, select which item goes up top, and retrieve the item up top.

Now I want to retireive ALL the strings in the ComboBox. The manual says
CONTROL GET TEXT hDlg, 301 TO a$
will do it. Then I
REPLACE CHR$(0) WITH "," IN a$
and PARSE$ out all the strings.

The concept is great ...
The problem is that a$ is empty???
If I simply substitute
COMBOBOX GET TEXT hDlg, 301 TO a$
then a$ returns the top item fine.

I have read poffs 20x and I am sure i am doing everything right, so why doesnt it work?



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Kind Regards
Mike

[Lance Edmonds]

That appears to be an error in the doc's - CONTROL GET TEXT on a combo box does not retrieve the string list.

The solution is to use CONTROL SEND with discrete Combobox messages...

Use %CB_GETCOUNT to get the item count, then set up a loop with %CB_GETLBTEXT.


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Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Mike Trader]

aaaaaaaah!
Well that accounts for that.

I have gotten these to work:
COMBOBOX GET TEXT hDlg, 301 TO TempStr
CONTROL SEND hDlg, 301, %CB_GETCURSEL, 0, 0 TO i
CONTROL SEND hDlg, 301, %CB_GETCOUNT, 0, 0 TO NumItems

But I cant get %CB_GETLBTEXT to work:

This is obviously wrong:
LOCAL zText AS STRING * 255
CONTROL SEND hDlg, 301, %CB_GETLBTEXT, i, 0 TO ztext

in the forum there are very few examples. One has:
SendMessage hComboBox, %CB_GETLBTEXT, Index, VARPTR(zText)
but this does not work for me
SENDMESSAGE 301, %CB_GETLBTEXT, i, VARPTR(zText)
TempStr = zText
TempStr is empty

I searched all the forums again and the downloads and ...
all the examples just get the top item (CURSEL)
Anyone got a working EXAMPLE of retrieveing ALL the text from a combobox? anything?




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Kind Regards
Mike

[Jim Huguley]

Mike..

SendMessage requires the handle to destination window. You are sending
301 which is your control identifier. Use GetDlgItem to retrieve the
correct handle..

hcomboBox = GetDlgItem(hWnd, 301)

SENDMESSAGE hcomboBox, %CB_GETLBTEXT, i, VARPTR(zText)


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Jim..
[email protected]

[Mike Trader]

Jim,
thx sooooo much. that works. Without a full and complete education in Win API these things that seem obvious are a eral problem for us in the learning process.

I have wasted about 4 hrs on this very simple but very frustrating problem!

I wrote a workaround that runs fine. It moves each item in turn up to the top or Current selection and then retrieves the text (commented out) but I can now use the better way of getting the text directly.

thx again

LOCAL i AS LONG, Pos AS LONG, NumItems AS LONG, MatchStr AS STRING, zText AS STRING * 255

CONTROL SEND hDlg, 301, %CB_GETCOUNT, 0, 0 TO NumItems
FOR i = 1 TO NumItems ' 0 is the first one and is empty unless selected?
SENDMESSAGE GETDLGITEM(hDlg, 301), %CB_GETLBTEXT, i-1, VARPTR(zText)
tempStr = zText
'COMBOBOX SELECT hDlg, 301, i
'COMBOBOX GET TEXT hDlg, 301 TO TempStr
Pos = i
MatchStr = RIGHT$(TempStr, 3)
IF INSTR(MainStr, MatchStr) > 0 THEN i = 999999 ' terminate the search
NEXT
COMBOBOX SELECT hDlg, 301, Pos ' Move it up to the top so user can see it


------------------
Kind Regards
Mike

[Jim Huguley]

Mike..

To be consistent and use all DDT.. The following will work..

CONTROL SEND hDlg, 301, %CB_GETLBTEXT, i-1, VARPTR(zText)



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Jim..
[email protected]