SendMessage() Help...

[AtomicChip]

Here's my problem...

All that I'm trying to do is input a string into a ListBox (created in a Visual Basic6 project) from a simple C++ DLL.

There are two controls on the VB form. A command button (Command1), and a listbox (List1).

The code in the VB project is as follows:

(In a module)...
Public Declare Function ShowInfo Lib "ListBoxInput.dll" (winHWnd As Long) As Integer

(On the form)...
Private Sub Command1_Click()
ShowInfo List1.hwnd
End Sub

As for the code in the .dll:

#include <windows.h>

#define NOMANGLE

NOMANGLE long _stdcall ShowInfo( long winHWnd );

char* t;

NOMANGLE long _stdcall ShowInfo( long winHWnd )
{
unsigned long ADDTEXT;
ADDTEXT = LB_ADDSTRING;

SendMessage( (HWND) winHWnd, (UINT) ADDTEXT, (WPARAM) 1, (LPARAM) &quot;Hello&quot;
return 1;

}

The function is exported using a .def file. At this point, the DLL is not generating any errors at all. It's just not sending the string (LPARAM) to the listbox.

I've been beating my head against a brick wall for hours now about this... Any help would be greatly appreciated. Thanks

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&quot;The night sky over the planet Krikkit is the least interesting sight in the entire universe.&quot;
-Hitch Hiker's Guide To The Galaxy

 

[Nosferatu]

I'm not sure about this (just a basic thing that I forget sometimes, giving me as well alot of headackes), but be certain that you have copied the new compiled DLL where you work with it... [red]Nosferatu[/red]
We are what we eat...
There's no such thing as free meal...
once stated: methane@personal.ro

 

[AtomicChip]

Nosferatu - Thanks for the reply, but I have already done the things suggested (The reference to the DLL in VB is set to the specific folder that VC++ is compiling to - Haven't copied the DLL to the Sys folder). If I run a style of debugging within the DLL (return a 1 if there's any kind of an error generated by using the SendMessage() function, or 0 if there is no error), the DLL returns a 0 every time indicating that it has run properly. Funny, still nothing coming up in the listbox in VB!
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&quot;The night sky over the planet Krikkit is the least interesting sight in the entire universe.&quot;
-Hitch Hiker's Guide To The Galaxy