Controls - CRASH using Sendmessage API to Combobox

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CRASH using Sendmessage API to Combobox

Printed From: Codejock Forums
Category: Codejock Products
Forum Name: Controls
Forum Description: Topics Related to Codejock Controls
URL: http://forum.codejock.com/forum_posts.asp?TID=11196
Printed Date: 10 May 2024 at 3:29am
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Topic: CRASH using Sendmessage API to Combobox

Posted By: Stilki
Subject: CRASH using Sendmessage API to Combobox
Date Posted: 24 June 2008 at 11:47pm

Sendmessage API crashes the combox when accessing the ItemData property after filling in the itemdata property using Sendmessage method.

'Add a string to the combox

ItemIndex = SendMessage(Hwnd, CB_ADDSTRING, 0, ByVal Item)

'Add a value to the ItemData property

ret = SendMessage(Hwnd, CB_SETITEMDATA, ItemIndex, ByVal ItemData)

When I fill in the ITEMS combox using Sendmessage it works ok.

When I fill in the ITEMDATA using Sendmessage it works ok.

When I try to access the ItemData property,

eg. Debug.Print Combox.ItemData(0)

it crashes with a message 'Object has disconnected from client...'

If I fill in the ItemData without the Sendmessage API there is no crash.

(Even if I have filled the Items using Sendmessage)

The reason for using the Sendmessage API method is to speed up the loading of large lists.

Replies:

Posted By: Oleg
Date Posted: 25 June 2008 at 12:38am

Hi,

Don't use API. Combo use own structures in ItemData.

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Oleg, Support Team
CODEJOCK SOFTWARE SOLUTIONS