source: trunk/Utilities/Miscellaneous/GetClipboardData/GetClipboardData.cpp @ 135

// GetClipboardData.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "GetClipboardData.h"

#define MAX_LOADSTRING 100

// Global Variables:
HINSTANCE hInst;                                                                // current instance
TCHAR szTitle[MAX_LOADSTRING];                                  // The title bar text
TCHAR szWindowClass[MAX_LOADSTRING];                    // the main window class name

// Forward declarations of functions included in this code module:
ATOM                            MyRegisterClass(HINSTANCE hInstance);
BOOL                            InitInstance(HINSTANCE, int);
LRESULT CALLBACK        WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK        About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY _tWinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPTSTR    lpCmdLine,
                     int       nCmdShow)
{
        UNREFERENCED_PARAMETER(hPrevInstance);
        UNREFERENCED_PARAMETER(lpCmdLine);

        // TODO: Place code here.
        MSG msg;
        HACCEL hAccelTable;

        // Initialize global strings
        LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
        LoadString(hInstance, IDC_GETCLIPBOARDDATA, szWindowClass, MAX_LOADSTRING);
        MyRegisterClass(hInstance);

        // Perform application initialization:
        if (!InitInstance (hInstance, nCmdShow))
        {
                return FALSE;
        }

        hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_GETCLIPBOARDDATA));

        // Main message loop:
        while (GetMessage(&msg, NULL, 0, 0))
        {
                if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
                {
                        TranslateMessage(&msg);
                        DispatchMessage(&msg);
                }
        }

        return (int) msg.wParam;
}



//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
//  COMMENTS:
//
//    This function and its usage are only necessary if you want this code
//    to be compatible with Win32 systems prior to the 'RegisterClassEx'
//    function that was added to Windows 95. It is important to call this function
//    so that the application will get 'well formed' small icons associated
//    with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
        WNDCLASSEX wcex;

        wcex.cbSize = sizeof(WNDCLASSEX);

        wcex.style                      = CS_HREDRAW | CS_VREDRAW;
        wcex.lpfnWndProc        = WndProc;
        wcex.cbClsExtra         = 0;
        wcex.cbWndExtra         = 0;
        wcex.hInstance          = hInstance;
        wcex.hIcon                      = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_GETCLIPBOARDDATA));
        wcex.hCursor            = LoadCursor(NULL, IDC_ARROW);
        wcex.hbrBackground      = (HBRUSH)(COLOR_WINDOW+1);
        wcex.lpszMenuName       = MAKEINTRESOURCE(IDC_GETCLIPBOARDDATA);
        wcex.lpszClassName      = szWindowClass;
        wcex.hIconSm            = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

        return RegisterClassEx(&wcex);
}

//
//   FUNCTION: InitInstance(HINSTANCE, int)
//
//   PURPOSE: Saves instance handle and creates main window
//
//   COMMENTS:
//
//        In this function, we save the instance handle in a global variable and
//        create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   HWND hWnd;

   hInst = hInstance; // Store instance handle in our global variable

   hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

   if (!hWnd)
   {
      return FALSE;
   }

   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);

   return TRUE;
}

//
//  FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
//  PURPOSE:  Processes messages for the main window.
//
//  WM_COMMAND  - process the application menu
//  WM_PAINT    - Paint the main window
//  WM_DESTROY  - post a quit message and return
//
//

HWND hNextClipboardViewerWindow;

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
        int wmId, wmEvent;
        PAINTSTRUCT ps;
        HDC hdc;

        switch (message)
        {

        #pragma region Real Code
        case WM_CREATE:
                hNextClipboardViewerWindow = SetClipboardViewer(hWnd);
                break;
        case WM_CHANGECBCHAIN:
                {
                        HWND hRemovedWindow = (HWND) wParam;
                        HWND hNextWindow = (HWND) lParam;
                        if(hNextClipboardViewerWindow == hRemovedWindow)
                                hNextClipboardViewerWindow = hNextWindow;
                        else if(hNextClipboardViewerWindow)
                                SendMessage(hNextClipboardViewerWindow, WM_CHANGECBCHAIN, wParam, lParam);
                }
                break;
        case WM_DRAWCLIPBOARD:
                {
                        if(OpenClipboard(hWnd)) 
                        {
                                if(IsClipboardFormatAvailable(CF_UNICODETEXT))
                                {
                                        HGLOBAL hData = (HGLOBAL) GetClipboardData(CF_UNICODETEXT);
                                        // ...
                                }
                                CloseClipboard();
                        }
                        if(hNextClipboardViewerWindow)
                                SendMessage(hNextClipboardViewerWindow, WM_DRAWCLIPBOARD, wParam, lParam);              
                }
                break;
        #pragma endregion

        case WM_COMMAND:
                wmId    = LOWORD(wParam);
                wmEvent = HIWORD(wParam);
                // Parse the menu selections:
                switch (wmId)
                {
                case IDM_ABOUT:
                        DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
                        break;
                case IDM_EXIT:
                        DestroyWindow(hWnd);
                        break;
                default:
                        return DefWindowProc(hWnd, message, wParam, lParam);
                }
                break;
        case WM_PAINT:
                hdc = BeginPaint(hWnd, &ps);
                // TODO: Add any drawing code here...
                EndPaint(hWnd, &ps);
                break;
        case WM_DESTROY:
                PostQuitMessage(0);
                break;
        default:
                return DefWindowProc(hWnd, message, wParam, lParam);
        }
        return 0;
}

// Message handler for about box.
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
        UNREFERENCED_PARAMETER(lParam);
        switch (message)
        {
        case WM_INITDIALOG:
                return (INT_PTR)TRUE;

        case WM_COMMAND:
                if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
                {
                        EndDialog(hDlg, LOWORD(wParam));
                        return (INT_PTR)TRUE;
                }
                break;
        }
        return (INT_PTR)FALSE;
}