PE_BEGINDATA - Microsoft Windows Pen API Programmer's Reference

Microsoft Windows Pen API Programmer's Reference

Custom Search

PE_BEGINDATA

Sent to the window specified by the htrgTarget member of the TARGET structure the first time any pen data is directed toward that window. Submessage of WM_PENEVENT.

Parameters
wParam

PE_BEGINDATA

lParam

Address of a TARGET structure.

Comments
A target window can initialize the dwData member of the TARGET structure with a handle to pen data (HPENDATA), a handwriting recognition object (HRC), or some private data type. If dwData is an HPENDATA object, the HPENDATA object should be in standard scale with no OEM data. For example, the HPENDATA object can be created as follows:

CreatePenDataEx(NULL, PDTS_STANDARDSCALE, CPD_TIME, 0);

The target window informs Windows of the type of data in the dwData member of the TARGET structure by returning LRET_HPENDATA, LRET_HRC, or LRET_PRIVATE (or LRET_DONE). If the application lets the message fall down to the Windows DefWindowProc function, then the function creates a handwriting recognition object (HRC) for this target.

The window can ignore all input except gestures. In this case, it must create a handwriting recognition object and customize it to recognize only gestures.

For an example of how an application can handle PE_BEGINDATA, see the source code for PENAPP.C in Chapter 7, "A Sample Pen Application."

See Also
TARGET, WM_PENEVENT

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