Thread: Ugh, ComboBox Woes

Ok, can anyone give me an example of a working default combo box? (By default i mean none user drawn)?

I am very new to Win32, and have only taken a few tutorials (i'll take many, if i can find ones that explain things well lol).

But with the Aid of MSDN, i am just getting lost.
I am creating my window with 'CreateWindow' just like a button i would create, i set the styles the way MSDN used as an example.

...CBS_SIMPLE, CBS_SORT, WS_VSCROLL, and WS_TABSTOP...

Now my problem.. or atleast i believe it to be so, is that i cannot add items to my ComboBox. I see nothing when i add my combo box, and i hope it is because there are no items held within it.

Now on the main ComboBox Overview on MSDN ( http://msdn.microsoft.com/library/de...comboboxes.asp )
it shows functions like CB_ADDSTRING.. or excuse me, "messages" (still not all together on that part, are they process by a ComboBox proc?), but beyond that i am still lost..


Anyway, help would be much appreciated.. MSDN has been making me frusterated, the fact that on their using a combo box page ( http://msdn.microsoft.com/library/de...comboboxes.asp ) i cannot find a simple example of their "Creating a Simple Combo Box" section. The only things they seem to show are spell checkers and user drawn junk (which i would like to grasp the basic box before user drawn).

Anyyway.. again.. please help, thanks!

Now may i ask what the

Code:

(long)TEXT("Item 1")

specifically means? I mean is that a C syntax? If so, can you briefly explain what it is about?

nono, i understand what it "does", but how it does it?

Like is the (long) a data type defining "TEXT" as a long?

I'm just at a lack of understanding the format of how that works?

And in regards to my first post, i am wondering about a general aspect. I saw on MSDN the Send Message CB_ADDSTRING thing, but i'm wondering about it more as a whole.

ie how do i handle the callbacks for a Combo box? (to get message returns such as user highlighted this string, so set this value to its string, ect..)

Ya.. here is an example code of nothing happening, now keep in mind this is litterally all i have involving the Combo Box, and that all this is inside my windows WM_CREATE message.

Code:

            HWND hEdit, hwndCombo1;
            hwndCombo1 = CreateWindow("COMBOBOX", "", 
                CBS_SIMPLE | CBS_SORT | WS_VSCROLL | WS_TABSTOP, 
                70, 
                10, 
                150, 
                50, 
                hwnd, NULL, (HINSTANCE) GetWindowLong(hwnd, GWL_HINSTANCE), NULL); 
            if(hwndCombo1 == NULL)
                MessageBox(hwnd, "Could not create edit box.", "Error", MB_OK | MB_ICONERROR);
            SendMessage(
                hwndCombo1,
                CB_ADDSTRING,
                0,
                (long)TEXT("myString"));

Any help on making this work? i see nothing.. (Note that hEdit is a button, i removed that part of this code because i assume it is irrelevant.)

and specify the controls uneque ID number as the HMENU param (if using WS_CHILD style)

>>LOWORD(wParam) contains the control id

MSDN
"For a child window, hMenu specifies the child-window identifier, an integer value used by a dialog box control to notify its parent about events. The application determines the child-window identifier; it must be unique for all child windows with the same parent window. "

ie
#define IDC_COMBO 40001 //past those used by resource.h

then in the createwindow use
(HMENU)IDC_COMBO

and in the parent's callback

Code:

switch(iMsg)
{
case WM_COMMAND:
      switch(LOWORD(wParam))
       {
       case IDC_COMBO: 
       if(HIWORD(wParam)==CBN_SELCHANGE)

Awesome! thanks