17 Jan, 2008
Sample Win32 C++ Windows Mobile 5.0 application
Posted by: Anca Alimanescu In: Mobile Dev
ou will be presented a basic Windows Mobile application written in native code.
The IDE used to develop it has been VSTO 2005 Proffesional Edition and we have also used the Windows Mobile 5.0 Pocket PC SDK. In order to see how to setup a project and create a “Hello World” application you can check Microsoft’s tutorial.
In order to be able to add a custom menu to the application, open the resource panel and from the Menu folder start customizing the .dlg file. In my application I added a File→Exit menu and an Options→Option1,Options→Option2 menus. They will be defined in the resourceppc.h header file.
#define ID_FILE_EXIT 32771
#define ID_OPTIONS_OPTION1 32772
#define ID_OPTIONS_OPTION2 32773
In the WndProc produre, we will handle the messages in the main window and for the WM_Create message we will build the menu bar.
case WM_CREATE:
SHMENUBARINFO mbi;
memset(&mbi, 0, sizeof(SHMENUBARINFO));
mbi.cbSize = sizeof(SHMENUBARINFO);
mbi.hwndParent = hWnd;
mbi.nToolBarId = IDR_MENU;
mbi.hInstRes = g_hInst;
mbi.dwFlags = SHCMBF_HMENU;
if (SHCreateMenuBar(&mbi))
{
HMENU hMenu = (HMENU)::SendMessage(mbi.hwndMB, SHCMBM_GETMENU, 0, 0);
MENUITEMINFO mii;
memset((char *)&mii, 0, sizeof(mii));
mii.cbSize = sizeof(mii);
LRESULT lResult = 0;
UINT i = 0;
while(true)
{
if(0 == ::GetMenuItemInfo(hMenu, i, TRUE, &mii))
{
break;
}
mii.fType |= MFT_OWNERDRAW;
lResult = ::SetMenuItemInfo(hMenu, i, TRUE, &mii);
++i;
}
g_hWndMenuBar = mbi.hwndMB;
}
else
{
g_hWndMenuBar = NULL;
}
// Initialise la structure d'informations sur l'activation du shell
memset(&s_sai, 0, sizeof (s_sai));
s_sai.cbSize = sizeof (s_sai);
break;
Each of the submenus will be handeled when the WM_COMMAND message is received:
case WM_COMMAND:
wmId = LOWORD(wParam);
wmEvent = HIWORD(wParam);
// Analyse les sélections de menu :
switch (wmId)
{
case IDM_HELP_ABOUT:
DialogBox(g_hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, About);
break;
case IDM_OK:
SendMessage (hWnd, WM_CLOSE, 0, 0);
break;
case ID_FILE_EXIT:
SendMessage (hWnd, WM_CLOSE, 0, 0);
break;
case ID_OPTIONS_OPTION1:
DialogBox (g_hInst, // Handle to the application instance.
(LPCTSTR)IDD_DIALOG1, // Identifies the dialog box template.
hWnd, // Handle to the owner window.
ReplaceDialogProc); // Pointer to the dialog box procedure.
break;
case ID_OPTIONS_OPTION2:
DialogBox (g_hInst, // Handle to the application instance.
(LPCTSTR)IDD_DIALOG2, // Identifies the dialog box template.
hWnd, // Handle to the owner window.
ReplaceDialogProc); // Pointer to the dialog box procedure.
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
break;
For each of the options chosen a custom dialog box will be displayed:
DialogBox (g_hInst, // Handle to the application instance.
(LPCTSTR)IDD_DIALOG2, // Identifies the dialog box template.
hWnd, // Handle to the owner window.
ReplaceDialogProc); // Pointer to the dialog box procedure.
It is important to know that for desingning dialog boxes you have to make sure to design one for the wide screen and one for the tight screen and to make sure to choose the right one according to the screen resolution. The example below shows how to choose the right About dialog box according to the phone’s settings.
#ifdef _DEVICE_RESOLUTION_AWARE
case WM_SIZE:
{
DRA::RelayoutDialog(
g_hInst,
hDlg,
DRA::GetDisplayMode() != DRA::Portrait ? MAKEINTRESOURCE(IDD_ABOUTBOX_WIDE) : MAKEINTRESOURCE(IDD_ABOUTBOX));
}
break;
#endif
In order to handle the mouse events and the key events, the application must handle the mouse button and the key pressed messages:
case WM_LBUTTONDOWN:
{
// Retrieve the handle to the display device context.
hdc = GetDC (hWnd);
// start drawing the text that will be displayed
int bReturn;
TCHAR szHelloStr[50];
StringCchCopy(szHelloStr, 50, L"Mouse clicked!");
// Set text color.
SetTextColor (hdc, RGB(0,0,0));
bReturn = ExtTextOut (hdc, 10 , 140, 0, NULL,
szHelloStr, lstrlen(szHelloStr), NULL);
// Release the device context.
ReleaseDC(hWnd, hdc);
}
break;
case WM_CHAR:
{
//if the space key was pressed
if (wParam == VK_SPACE)
{
MessageBox(hWnd,L"You pressed Space.", L"Space key", MB_OK | MB_ICONINFORMATION);
}
else
{
MessageBox(hWnd,L"You have not pressed Space key.", L"Space key", MB_OK | MB_ICONINFORMATION);
}
}
break;
In our sample application when the left mouse button is clicked, a message will be displayed on the screen. If the Space key is pressed, a message box will appear confirming the user that he has pressed the Space key, or if not, other key.
