C++ 创建项目并将其添加到列表框

Question

Sorry for this noob question but i'm new to C++ (coming from C#). I have a list of items from an array that i want to display on a listbox (just do display - nothing else). Adding a control in c++ was a lot harder than i thought.

Here's what i have so far: I'm not sure how to proceed from here and how to get it to work. Thanks in advance.

// .rh file
#define IDC_LISTDIR                 106

//in the .rc file
CONTROL "ListBox", IDC_LISTDIR, "listbox", WS_CHILD | WS_VISIBLE | WS_VSCROLL | ES_AUTOHSCROLL | WS_GROUP, 8, 80, 200, 60

//main
SendMessage(HANDLE, LB_ADDSTRING, 0, (LPARAM)L"Add This Text to listbox");

Also, i'm getting this: error C2275: 'HANDLE': illegal use of this type as an expression

IDD_MAINWINDOW DIALOG 36, 54, 421, 252
EXSTYLE WS_EX_DLGMODALFRAME | WS_EX_CLIENTEDGE
CAPTION "Listbox Test"
FONT 9, "MS Sans Serif"
{   
    CONTROL "&OK", IDOK, "button", WS_CHILD | WS_VISIBLE | WS_TABSTOP, 100, 5, 40, 14
    CONTROL "&Cancel", IDCANCEL, "button", WS_CHILD | WS_VISIBLE | WS_TABSTOP, 100, 30, 30, 14
    CONTROL "CheckBox", IDC_YESNO, "button", BS_AUTOCHECKBOX | WS_CHILD | WS_VISIBLE | WS_GROUP, 9, 55, 77, 22
    CONTROL "ListBox", IDC_LISTDIR, "listbox", WS_CHILD | WS_VISIBLE | WS_VSCROLL | ES_AUTOHSCROLL | WS_GROUP, 8, 80, 200, 60
}

Answer 1

SendMessage() takes an HWND to send the message to. HANDLE is a type, not an HWND variable. You need the actual HWND of the ListBox at runtime. Use GetDlgItem() to get that, eg:

HWND hwndLB = GetDlgItem(hwndDlg, IDC_LISTDIR);
SendMessage(hwndLB, LB_ADDSTRING, 0, (LPARAM)L"Add This Text to listbox");

Where hwndDlg is the HWND of the window that the ListBox is a child of.