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Checks whether a specified window is touch-capable and, optionally, retrieves the modifier flags set for the window's touch capability.
Syntax
BOOL IsTouchWindow(
[in] HWND hwnd,
[out, optional] PULONG pulFlags
);
Parameters
[in] hwnd
The handle of the window. The function fails with ERROR_ACCESS_DENIED if the calling thread is not on the same desktop as the specified window.
[out, optional] pulFlags
The address of the ULONG variable to receive the modifier flags for the specified window's touch capability.
Return value
Returns TRUE if the window supports Windows Touch; returns FALSE if the window does not support Windows Touch.
Remarks
The following table lists the values for the pulFlags output parameter.
| Flag | Description |
|---|---|
| TWF_FINETOUCH | Specifies that hWnd prefers noncoalesced touch input. |
| TWF_WANTPALM |
Clearing this flag disables palm rejection which reduces delays for getting WM_TOUCH messages.
This is useful if you want as quick of a response as possible when a user touches your application.
Setting this flag enables palm detection and will prevent some WM_TOUCH messages from being sent to your application. This is useful if you do not want to receive WM_TOUCH messages that are from palm contact. |
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 7 [desktop apps only] |
| Minimum supported server | Windows Server 2008 R2 [desktop apps only] |
| Target Platform | Windows |
| Header | winuser.h (include Windows.h) |
| Library | User32.lib |
| DLL | User32.dll |
| API set | ext-ms-win-ntuser-misc-l1-2-0 (introduced in Windows 8.1) |