Creating a Simple List Box - Win32 Programmer's Reference

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Creating a Simple List Box

The following example demonstrates how a dialog box procedure creates a simple list box and fills it with the names of people on a softball team. When a name in the list is selected, additional information about the player is displayed in the dialog box. The following illustration shows the dialog box.

The list box has the LBS_STANDARD style, a combination of LBS_SORT, LBS_NOTIFY, WS_VSCROLL, and WS_BORDER. The code initializes the dialog box while processing the WM_INITDIALOG message. For each name that appears in the list box, the code sends an LB_ADDSTRING message to the list box. By processing the LBN_SELCHANGE notification message, the code also keeps track of when the selection changes.

#define BUFFER MAX_PATH

#define NAMELENGTH 15

#define POSITIONLENGTH 20

#define TEAMSIZE 15

typedef struct {

TCHAR tchName[NAMELENGTH];

TCHAR tchPosition[POSITIONLENGTH];

int nGamesPlayed;

int nInningsPlayed;

double xBattingAverage;

TCHAR tchFoodName[NAMELENGTH];

} Player;

Player Roster[] = {

{"Pete", "shortstop", 26, 90, .608, "Rutabaga"},

{"Suzanna", "catcher", 16, 53, .286, "Toast"},

{"Jack", "pitcher", 27, 110, .542, "Animal Crackers"},

{"Karen", "second base", 26, 140, .238, "Pez"},

{"Dave", "first base", 28, 138, .508, "Suds"},

{"Wendy", "third base", 25, 154, .493, "Ham"},

{"Matt", "shortstop", 24, 112, .579, "Oats"},

{"Jenny", "right field", 22, 101, .509, "Mashed Potatoes"},

{"Seth", "left-center field", 20, 76, .407, "Otter Pop"},

{"Kathie", "left field", 26, 127, .353, "Baba Ganouj"},

{"Colin", "pitcher", 26, 96, .456, "Lefse"},

{"Penny", "right field", 24, 112, .393, "Zotz"},

{"Art", "left-center field", 17, 56, .375, "Cannelloni"},

{"Cindy", "second base", 13, 58, .207, "Tequila"},

{"David", "center field", 18, 101, .612, "Bok Choy"}

};

* FUNCTION: DlgTeamProc(HWND, unsigned, UINT, LONG)

* PURPOSE: Dialog box for "BFG Softball Statistics"

BOOL APIENTRY DlgTeamProc(

HWND hDlg, /* window handle of dialog box */

UINT message, /* type of message */

UINT wParam, /* message-specific information */

LONG lParam) /* message-specific information */

{

TCHAR tchBuffer[BUFFER];

int nItem;

int i;

HWND hwndList;

switch (message) {

case WM_INITDIALOG:

{

hwndList = GetDlgItem(hDlg, IDL_SOFTBALL);

/* Initialize the list box (fill it with player names). */

for (i = 0; i < TEAMSIZE; i++) {

SendMessage(hwndList, LB_ADDSTRING, 0,

(LPARAM) Roster[i].tchName);

SendMessage(hwndList, LB_SETITEMDATA, i, (LPARAM) i);

}

SetFocus(hwndList);

return FALSE;

}

case WM_COMMAND:

switch (LOWORD(wParam)) {

case IDL_SOFTBALL:

switch (HIWORD(wParam)) {

case LBN_SELCHANGE:

/* Show the selected player's statistics. */

hwndList = GetDlgItem(hDlg, IDL_SOFTBALL);

nItem = SendMessage(hwndList, LB_GETCURSEL,

0, 0);

i = SendMessage(hwndList, LB_GETITEMDATA,

nItem, 0);

SetDlgItemText(hDlg, IDS_POS,

Roster[i].tchPosition);

SetDlgItemText(hDlg, IDS_GAME,

_itoa(Roster[i].nGamesPlayed,

tchBuffer, 10));

SetDlgItemText(hDlg, IDS_INN,

_itoa(Roster[i].nInningsPlayed,

tchBuffer, 10));

SetDlgItemText(hDlg, IDS_BA,

_gcvt(Roster[i].xBattingAverage,

3, tchBuffer));

SetDlgItemText(hDlg, IDS_FOOD,

Roster[i].tchFoodName);

return TRUE;

}

break;

case IDOK:

case IDCANCEL:

/* Destroy the dialog box. */

EndDialog(hDlg, TRUE);

return TRUE;

default:

return FALSE;

}

default:

return FALSE;

}

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