116 lines
3.4 KiB
C++
116 lines
3.4 KiB
C++
// Copyright (C) 1996-1997 Microsoft Corporation. All rights reserved.
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#include "header.h"
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#ifdef _DEBUG
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#undef THIS_FILE
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static const char THIS_FILE[] = __FILE__;
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#endif
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#define DLG_CLASS 0x00008002
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HHOOK g_hHook = NULL; // Handle to the WH_CALLWNDPROC hook.
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HHOOK g_hCBTHook = NULL; // Handle to the WH_CBT hook.
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BOOL g_bPrintDlgDisplayed = FALSE; // Flag that's set when the WebBrowser print dialog has been displayed once.
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BOOL g_bCancel = FALSE; // Flag that's set when a dialog's cancel button has been clicked.
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// This is the hook procedure for the WH_CALLWNDPROC hook.
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LRESULT CALLBACK CHTMLPrintDlg::HookProc(int code, WPARAM wParam, LPARAM lParam)
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{
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// Call the next hook if code is less than 0. (Standard hook stuff.)
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if (code < 0)
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return ::CallNextHookEx(g_hHook, code, wParam, lParam);
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LPCWPSTRUCT lpMsg = (LPCWPSTRUCT) lParam;
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switch (lpMsg->message)
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{
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// Watch for the WebBrowser's print dialog to be initialized.
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case WM_INITDIALOG:
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{
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// If the print dialog has been displayed once,
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// simulate a click on the OK button. The CBT hook procedure
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// will move the dialog off of the screen, so the user
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// won't be able to click it.
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if (g_bPrintDlgDisplayed)
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{
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// Get the window handle for the OK button.
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HWND hOKButton = ::GetDlgItem(lpMsg->hwnd, IDOK);
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// Post a message to the OK button to make it
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// think it's been clicked.
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if (hOKButton != NULL)
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{
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::PostMessage(hOKButton, WM_LBUTTONDOWN, 0, 0);
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::PostMessage(hOKButton, WM_LBUTTONUP, 0, 0);
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}
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}
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else
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// If this is the first time the print dialog is being
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// displayed (g_bPrintDlgDisplayed == FALSE), don't simulate
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// the button click. The CBT hook procedure won't move the
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// dialog off the screen. Now that the dialog has been displayed
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// once, set g_bPrintDlgDisplayed to TRUE.
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g_bPrintDlgDisplayed = TRUE;
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}
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break;
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case WM_COMMAND:
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// If g_bPrintDlgDisplayed is TRUE (the user can see the print dialog),
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// watch for a click on the Cancel button. The control should stop
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// printing if the user clicks cancel.
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if (HIWORD(lpMsg->wParam) == BN_CLICKED && LOWORD(lpMsg->wParam) == IDCANCEL)
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g_bCancel = TRUE;
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}
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return 0;
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}
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// This is the hook procedure for the WH_CBT hook.
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LRESULT CALLBACK CHTMLPrintDlg::CBTHookProc(int code, WPARAM wParam, LPARAM lParam)
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{
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// Call the next hook if code is less than 0. (Standard hook stuff.)
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if (code < 0)
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return ::CallNextHookEx(g_hCBTHook, code, wParam, lParam);
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// Watch for the WebBrowser print dialog to be created.
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if (code == HCBT_CREATEWND)
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{
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LPCBT_CREATEWND lpcbtcw = (LPCBT_CREATEWND) lParam;
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// Make sure that it's a dialog box that's being created.
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// The only dialog that should be hooked is the print dialog
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// because the hook is installed after the main dialog and
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// the progress dialog have been created. Of course, if
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// the WebBrowser displays a message box, this would probably
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// hook it, so that could be a problem.
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if ((DWORD)lpcbtcw->lpcs->lpszClass == DLG_CLASS)
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{
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// Move the dialog off of the screen unless it's being
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// displayed for the first time.
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// BUGBUG: 13-Oct-1997 [ralphw] Check the window name to be
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// sure we have the right dialog box.
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if (g_bPrintDlgDisplayed)
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lpcbtcw->lpcs->x = -(lpcbtcw->lpcs->cx);
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}
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}
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return 0;
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}
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