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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| -
| Header File
| winuser.h
| Unicode
| No
| Platform Notes
| None
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EM_UNDO
An application sends an EM_UNDO message to undo the last edit control
operation.
EM_UNDO
wParam = 0; // not used; must be zero
lParam = 0; // not used; must be zero
Parameters
This message has no parameters.
Return Values
For a single-line edit control, the return value is always TRUE. For a
multiline edit control, the return value is TRUE if the undo operation is successful,
or FALSE if the undo operation fails.
Remarks
An undo operation can also be undone. For example, you can restore deleted
text with the first EM_CANUNDO message, and remove the text again with a second
EM_CANUNDO message as long as there is no intervening edit operation.
See Also
EM_CANUNDO
Related Links
Software for Delphi and C++ Builder developers
Software for Visual Studio .NET developers
Software for Visual Basic 6 developers
Delphi Tips&Tricks
MegaDetailed.NET
TMS Scripter Studio Pro components for Delphi/C++Builder
More Online Helps
Win32 Multimedia Programmer's Reference (mmedia.hlp)
OLE Programmer's Reference (ole.hlp)
Microsoft Windows Pen API Programmer's Reference (penapi.hlp)
Microsoft Windows Sockets 2 Reference (sock2.hlp)
Microsoft Windows Telephony API (TAPI) Programmer's Reference (tapi.hlp)
Unix Manual Pages
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