Microsoft KB Archive/90485

= Passing Ink Between Hedit Controls =

Article ID: 90485

Article Last Modified on 8/4/2004

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APPLIES TO


 * Microsoft Windows for Pen Computing 1.0

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This article was previously published under Q90485



SUMMARY
To pass ink between hedit controls, an application must capture the ink when the hedit control's parent window receives the HN_ENDREC notification message. Then the application does either of the following:


 * Sends a WM_HEDITCTL message with wParam set to HE_SETINKMODE to begin collecting ink, and sends a WM_HEDITCTL message with wParam set to HE_STOPINKMODE to stop collecting ink.
 * Specifies RCO_SAVEHPENDATA in the lRcOptions field of the RC data structure.

INK2H is a file that demonstrates capturing ink and using the WM_HEDITCTL message.



MORE INFORMATION
The following files are available for download from the Microsoft Download Center:

Ink2h.exe

For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to Obtain Microsoft Support Files from Online Services

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The recognizer returns ink in the hpendata field of the RCRESULT structure. Passing ink between hedit controls is more difficult than using a normal device context (DC). Perform the following four steps to save the ink:

 Perform either of the following:

 Specify RCO_SAVEHPENDATA in the lRcOptions field of the RC data structure. Send the WM_HEDITCTL message to the hedit control with HE_SETINKMODE in wParam to begin collecting ink. Send the WM_HEDITCTL message to the hedit control with HE_STOPINKMODE to stop collecting ink.  When the application receives an HN_ENDREC notification for the source hedit control, retrieve the handle to the memory containing the ink. (When recognition is complete, the recognizer sends a WM_COMMAND message with the HN_ENDREC notification as the high-order word of lParam and the ID of the hedit control in wParam.) Use the SendMessage function to send a WM_HEDITCTL message with HE_GETINKHANDLE as the value for wParam. If the call is successful, the low-order word of the returned value contains a handle to the memory containing the ink. Depending on the choice made at step 1 above, perform the corresponding step:

 If the RCO_SAVEHPENDATA flag was set in step 1, Windows will not delete the data after all corresponding WM_RCRESULT messages have been sent. Therefore, call the DestroyPenData function to delete the pen data when an HN_RCRESULT notification is received.</li> If HE_SETINKMODE is used, call the DuplicatePenData function to save the ink into a block of memory allocated by the GlobalAlloc function.</li></ol> </li></ol>

The procedure to place the collected ink into another hedit control is very similar. Send a WM_HEDITCTL message with wParam set to HE_SETINKMODE and the low-order of lParam set to the handle to the memory block containing the ink. Then send a WM_HEDITCTL message with wParam set to HE_STOPINKMODE.

The INK2H sample application demonstrates copying ink between hedit controls using the HE_SETINKMODE and HE_STOPINKMODE values with a WM_HEDITCTL message.

Additional query words: softlib INK2H.EXE kbfile

Keywords: kbdownload kb16bitonly kbfile kbsample KB90485

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