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Данилин Руслан (2002-07-19 14:04) [0]

Как сделать, чтобы по нажвтию Ctrl + Esc меню не всплывало.

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Eugene Lachinov (2002-07-19 14:29) [1]

HOWTO: Disable Task Switching on Win32 Platforms
ID: Q226359

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The information in this article applies to:

Microsoft Win32 Application Programming Interface (API), included with:
Microsoft Windows versions 95, 98
Microsoft Windows 2000
Microsoft Windows NT, versions 3.51, 4.0

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SUMMARY
This article describes how to disable task switching and other system functions accessed through key combinations such as CTRL+ESC and ATL+TAB on Win32 Platforms.

Windows 95 and Windows 98
Applications can enable and disable ALT+TAB and CTRL+ESC, for example, by calling SystemParametersInfo (SPI_SETSCREENSAVERRUNNING). To disable ALT+TAB and CTRL+ESC, set the uiParam parameter to TRUE; to enable the key combinations, set the parameter to FALSE:

UINT nPreviousState;

// Disables task switching
SystemParametersInfo (SPI_SETSCREENSAVERRUNNING, TRUE, &nPreviousState, 0);

// Enables task switching
SystemParametersInfo (SPI_SETSCREENSAVERRUNNING, FALSE, &nPreviousState, 0);
NOTE: Applications that use SystemParametersInfo (SPI_SETSCREENSAVERRUNNING) to disable task switching must enable task switching before exiting or task switching remains disabled after the process terminates.
Windows NT 4.0 Service Pack 3 and Later and Windows 2000
Applications can disable ALT+TAB or CTRL+ESC by installing a low-level keyboard hook. A low-level keyboard hook (WH_KEYBOARD_LL) is installed by calling SetWindowsHookEx. For more information on Window hooks see the "Hooks" overview in the Platform SDK documentation.

The following is a sample low-level keyboard hook procedure that disables CTRL+ESC, ALT+TAB, and ALT+ESC:

LRESULT CALLBACK LowLevelKeyboardProc (INT nCode, WPARAM wParam, LPARAM lParam)
{
// By returning a non-zero value from the hook procedure, the
// message does not get passed to the target window
KBDLLHOOKSTRUCT *pkbhs = (KBDLLHOOKSTRUCT *) lParam;
BOOL bControlKeyDown = 0;

switch (nCode)
{
case HC_ACTION:
{
// Check to see if the CTRL key is pressed
bControlKeyDown = GetAsyncKeyState (VK_CONTROL) >> ((sizeof(SHORT) * 8) - 1);

// Disable CTRL+ESC
if (pkbhs->vkCode == VK_ESCAPE && bControlKeyDown)
return 1;

// Disable ALT+TAB
if (pkbhs->vkCode == VK_TAB && pkbhs->flags & LLKHF_ALTDOWN)
return 1;

// Disable ALT+ESC
if (pkbhs->vkCode == VK_ESCAPE && pkbhs->flags & LLKHF_ALTDOWN)
return 1;

break;
}

default:
break;
}
return CallNextHookEx (hHook, nCode, wParam, lParam);
}
Windows NT 4.0 Service Pack 2 and Earlier, Windows NT 3.51 and Earlier
Applications can disable CTRL+ESC system-wide by replacing the Windows NT Task Manager, but this is not recommended.

Applications can disable ALT+TAB and ALT+ESC when the application is running by registering hotkeys for the ALT+TAB and ALT+ESC combinations by calling RegisterHotKey.

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