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[C++] gets the text from specific index at listbox

 
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Stylo
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PostPosted: Wed Jul 29, 2009 9:55 am    Post subject: [C++] gets the text from specific index at listbox Reply with quote
i'm having troubles suddenly when i try to get the text from a specific index from listbox
i first get the index that the cursor set b4
Code:

int index;
index = SendMessage(hList,LB_GETCURSEL,0,0);

then i try to get the text from that specific index
Code:

wchar_t *lpwName;
SendMessage(hList,LB_GETTEXT,(WPARAM)Index,(LPARAM)lpwName);

but my program crushes for no reason
i try using GetLastError but it keeps returning me 0 which means there's non.
:S any1 ?!
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Anden100
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PostPosted: Wed Jul 29, 2009 10:06 am    Post subject: Reply with quote
Not sure if this will help, but try to allocate some space for the character, or by making an array of wchar_t's, ex:

Code:
wchar_t lpwName[500];
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smartz993
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PostPosted: Wed Jul 29, 2009 10:06 am    Post subject: Reply with quote
lpwName is a NULL pointer, no?

Allocate some memory for it.
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Anden100
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PostPosted: Wed Jul 29, 2009 10:09 am    Post subject: Reply with quote
smartz993 wrote:
lpwName is a NULL pointer, no?

Allocate some memory for it.


Code:
wchar_t lpwName = malloc(500);

Not sure, but will that work?
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Stylo
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PostPosted: Wed Jul 29, 2009 10:23 am    Post subject: Reply with quote
yeah it works perfectly
i guess i should have allocate some memory for it thx guys :]
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TraxMate
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PostPosted: Wed Jul 29, 2009 10:26 am    Post subject: Reply with quote
You need to allocate some memory for the string. A smart way is to first get the length of the string from the listbox so you know how much memory you need to allocate.
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Stylo
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PostPosted: Wed Jul 29, 2009 10:29 am    Post subject: Reply with quote
sounds nice i like it :]
works great thanks
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&Vage
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PostPosted: Wed Jul 29, 2009 5:28 pm    Post subject: Reply with quote
1qaz wrote:
sounds nice i like it :]
works great thanks

Don't forget to free(); after your done when using malloc ;3
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