PHONE_BUTTON - Telephony API Programmer's Reference

Custom Search

PHONE_BUTTON

The PHONE_BUTTON message is sent to notify the application that button press monitoring is enabled if it has detected a button press on the local phone.

PHONE_BUTTON
hPhone = (HPHONE) hPhoneDevice;

dwCallbackInstance = (DWORD) hCallback;

dwParam1 = (DWORD) idButtonOrLamp;

dwParam2 = (DWORD) ButtonMode;

dwParam3 = (DWORD) ButtonState;

Parameters
hPhone

A handle to the phone device.

dwCallbackInstance

The application's callback instance provided when opening the phone device.

dwParam1

The button/lamp ID of the button that was pressed. Note that button IDs 0 through 11 are always the KEYPAD buttons, with '0' being button ID 0, '1' being button ID 1 (and so on through button ID 9), and with '*' being button ID 10, and '#' being button ID 11. Additional information about a button ID is available with phoneGetDevCaps and phoneGetButtonInfo.

dwParam2

The button mode of the button. This parameter uses the following PHONEBUTTONMODE_ constants:

PHONEBUTTONMODE_CALL

The button is assigned to a call appearance.

PHONEBUTTONMODE_FEATURE

The button is assigned to requesting features from the switch, such as hold, conference, and transfer.

PHONEBUTTONMODE_KEYPAD

The button is one of the twelve keypad buttons, '0' through '9', '*', and '#'.

PHONEBUTTONMODE_LOCAL

The button is a local function button, such as mute or volume control.

PHONEBUTTONMODE_DISPLAY

The button is a "soft" button associated with the phone's display. A phone set can have zero or more display buttons.

dwParam3

Specifies whether this is a button-down event or a button-up event. This parameter uses the following PHONEBUTTONSTATE_ constants:

PHONEBUTTONSTATE_UP

The button is in the "up" state.

PHONEBUTTONSTATE_DOWN

The button is in the "down" state (pressed down).

PHONEBUTTONSTATE_UNKNOWN

Indicates that the up or down state of the button is not known at this time, but may become known at a future time.

PHONEBUTTONSTATE_UNAVAIL

Indicates that the up or down state of the button is not known to the service provider, and will not become known at a future time.

Return Values
No return value.

Remarks
A PHONE_BUTTON message is sent whenever a button changes state. An application is guaranteed that for each button down event, it will eventually be sent a corresponding button up event. A service provider that is incapable of detecting the actual button up is required to generate the button up message shortly after the button down message for each button press.

See Also
phoneGetButtonInfo, phoneGetDevCaps

Last news from Greatis Software

    Nostalgia .Net     .Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More »

Recommended software for developers

    Ultimate Pack     Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More »

    Form Designer .Net     Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More »

    Print Suite .Net     Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More »

    Gradient Controls .Net     Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More »

    Greatis iGrid     iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More »

All the contacts and projects

Dmitry Vasiliev (just.dmitry)

More Online Helps

Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages

greatis just4fun network