Windows Hotkeys

This section explains how to setup hot-keys on Windows. More...

Functions
TEAMTALKDLL_API TTBOOL	TT_HotKey_Register (IN TTInstance *lpTTInstance, IN INT32 nHotKeyID, IN const INT32 *lpnVKCodes, IN INT32 nVKCodeCount)
	Register a global hotkey.
TEAMTALKDLL_API TTBOOL	TT_HotKey_Unregister (IN TTInstance *lpTTInstance, IN INT32 nHotKeyID)
	Unregister a registered hotkey.
TEAMTALKDLL_API INT32	TT_HotKey_IsActive (IN TTInstance *lpTTInstance, IN INT32 nHotKeyID)
	Check whether hotkey is active.
TEAMTALKDLL_API TTBOOL	TT_HotKey_InstallTestHook (IN TTInstance *lpTTInstance, IN HWND hWnd, UINT32 uMsg)
	Install a test hook so the HWND will be messaged whenever a key or mouse button is pressed.
TEAMTALKDLL_API TTBOOL	TT_HotKey_RemoveTestHook (IN TTInstance *lpTTInstance)
	Remove the test hook again so the hWnd in TT_HotKey_InstallTestHook will no longer be notified.
TEAMTALKDLL_API TTBOOL	TT_HotKey_GetKeyString (IN TTInstance *lpTTInstance, IN INT32 nVKCode, OUT TTCHAR szKeyName[TT_STRLEN])
	Get a string description of the virtual-key code.

Detailed Description

This section explains how to setup hot-keys on Windows.

Hotkeys can be used to e.g. enable push-to-talk.

Windows supports intercepting key strokes globally, i.e. without having the user application's window focused. To investigate which keys are currently being pressed the function TT_HotKey_InstallTestHook can be used. Once the desired key-combination has been found the function TT_HotKey_Register can be used to register the combination as a hotkey and have the CLIENTEVENT_HOTKEY event posted whenever the key combination becomes active.

Note that it's not advised to have a hotkey installed while debugging an application in Visual Studio. It slows down the debugger dramatically.

Function Documentation

TT_HotKey_Register()

TEAMTALKDLL_API TTBOOL TT_HotKey_Register	(	IN TTInstance *	lpTTInstance,
		IN INT32	nHotKeyID,
		IN const INT32 *	lpnVKCodes,
		IN INT32	nVKCodeCount
	)

Register a global hotkey.

When the hotkey becomes active or inactive it will send CLIENTEVENT_HOTKEY to the HWND passed to TT_InitTeamTalk.

A hotkey can e.g. be used as a push-to-talk key combination. When the hotkey becomes active call TT_EnableVoiceTransmission().

Note that having a hotkey enabled makes the Visual Studio debugger really slow to respond, so when debugging it's best not to have hotkeys enabled.

Parameters

lpTTInstance	Pointer to client instance created by TT_InitTeamTalk.
nHotKeyID	The ID of the hotkey to register. It will be passed as the WPARAM when the hotkey becomes either active or inactive.
lpnVKCodes	An array of virtual key codes which constitute the hotkey. This document outlines the virtual key codes: http://msdn.microsoft.com/en-us/library/ms645540(VS.85).aspx A hotkey consisting of Left Control+A would have the array consist of [162, 65].
nVKCodeCount	The number of virtual key codes in the array (in other words the size of the lpnVKCodes array).

See also

TT_InitTeamTalk

TT_HotKey_Unregister

TT_HotKey_InstallTestHook

TT_HotKey_Unregister()

TEAMTALKDLL_API TTBOOL TT_HotKey_Unregister	(	IN TTInstance *	lpTTInstance,
		IN INT32	nHotKeyID
	)

Unregister a registered hotkey.

Parameters

lpTTInstance	Pointer to client instance created by TT_InitTeamTalk.
nHotKeyID	is the ID of the hotkey to unregister.

See also

TT_HotKey_Register

TT_HotKey_IsActive()

TEAMTALKDLL_API INT32 TT_HotKey_IsActive	(	IN TTInstance *	lpTTInstance,
		IN INT32	nHotKeyID
	)

Check whether hotkey is active.

Parameters

lpTTInstance	Pointer to client instance created by TT_InitTeamTalk.
nHotKeyID	is the ID of the registered hotkey.

Returns

1 if active, 0 if inactive, -1 if hotkey-ID is invalid

TT_HotKey_InstallTestHook()

TEAMTALKDLL_API TTBOOL TT_HotKey_InstallTestHook	(	IN TTInstance *	lpTTInstance,
		IN HWND	hWnd,
		UINT32	uMsg
	)

Install a test hook so the HWND will be messaged whenever a key or mouse button is pressed.

Capture the event CLIENTEVENT_HOTKEY_TEST.

Parameters

lpTTInstance	Pointer to client instance created by TT_InitTeamTalk.
hWnd	is the handle of the window which will be notified.
uMsg	The window message to post to hWnd when a key event occurs. Basically it calls PostMessage(hWnd, Msg, VirtualKey-id, Active);

See also

TT_HotKey_RemoveTestHook

CLIENTEVENT_HOTKEY_TEST

TT_HotKey_RemoveTestHook()

TEAMTALKDLL_API TTBOOL TT_HotKey_RemoveTestHook

(

IN TTInstance *

lpTTInstance

)

Remove the test hook again so the hWnd in TT_HotKey_InstallTestHook will no longer be notified.

Parameters

lpTTInstance

Pointer to client instance created by TT_InitTeamTalk.

See also

TT_HotKey_InstallTestHook

TT_HotKey_GetKeyString()

TEAMTALKDLL_API TTBOOL TT_HotKey_GetKeyString	(	IN TTInstance *	lpTTInstance,
		IN INT32	nVKCode,
		OUT TTCHAR	szKeyName[TT_STRLEN]
	)

Get a string description of the virtual-key code.

Parameters

lpTTInstance	Pointer to client instance created by TT_InitTeamTalk.
nVKCode	The virtual key code passed in CLIENTEVENT_HOTKEY_TEST.
szKeyName	Will receive key description in local language.

See also

TT_HotKey_Register