The hedit Control
Except under special circumstances, the hedit control displays two sets of
text. First, the handwritten characters appear as written by the user, formed by
the ink trail of the pen. When the writing is recognized, the handwritten ink
disappears from the screen, replaced within the control window by the interpreted
characters as determined by the recognizer. The interpreted text appears in a
Windows font as though typed at the keyboard.
The following instruction creates a multiline hedit control with left
hwndHedit = CreateWindow( "HEDIT", NULL,
ES_MULTILINE | ES_LEFT |
WS_CHILD | WS_VISIBLE,
hwndParent, CHILD_ID, hinstCurrent, NULL );
The styles of ES_MULTILINE and ES_LEFT do not constrain the freeform approach
of handwriting in an hedit control. The user can write anywhere on the pen
tablet allowed by the control
usually within or near the control window. The styles determine the format of
the resulting interpreted text displayed in the control.
The hedit control is a pen-aware version of the default Windows 3.1 edit
control. The hedit control not only supports handwritten characters and gestures,
but also responds normally to keyboard and mouse events in the same way as an
edit control. An application can use an hedit control anywhere a regular edit
control will work, including dialog boxes. In fact, specifying EDIT class for a
control in Windows 95 automatically creates an hedit control. The hedit control is
visually identical to a standard control except that it displays a pen pointer
instead of an I-beam pointer. Single-line hedit controls also display a lens
button when a pen is present. When specifying an HEDIT control for a dialog box
in a resource, use the DIALOGEX
resource. Refer to the DIALOGEX resource description in the Win32 SDK tools
documentation for a more information on using the HEDIT control class.
With a window style of ES_READONLY, an hedit window can accept no pen input.
The pointer within the control does not change to a pen.
An hedit control processes tabs and carriage returns differently depending on
whether they are entered as gestures or typed from the keyboard. If the user
draws a tab or carriage return gesture in a multiline hedit control, the control
inserts a tab or carriage return character into the text. For tabs and carriage
returns entered from the keyboard, an hedit control in a dialog box mimics the
standard dialog box behavior
that is, pressing the TAB or RETURN key passes control respectively to the TABSTOP
statement given in the dialog box template.
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