|
Overview |
|
|
|
Group |
|
|
|
Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| -
| Header File
| winuser.h
| Unicode
| No
| Platform Notes
| None
|
|
|
WM_COPYDATA
The WM_COPYDATA message is sent when an application passes data to another
application.
WM_COPYDATA
wParam = (WPARAM) (HWND) hwnd; // handle of sending window
lParam = (LPARAM) (PCOPYDATASTRUCT) pcds; // pointer to structure with data
Parameters
hwnd
Identifies the window passing the data.
pcds
Points to a COPYDATASTRUCT structure that contains the data to be passed.
Return Values
If the receiving application processes this message, it should return TRUE;
otherwise, it should return FALSE.
Remarks
An application must use the SendMessage function to send this message, not the PostMessage function.
The data being passed must not contain pointers or other references to objects
not accessible to the application receiving the data.
While this message is being sent, the referenced data must not be changed by
another thread of the sending process.
The receiving application should consider the data read-only. The pcds parameter is valid only during the processing of the message. The receiving
application should not free the memory referenced by pcds. If the receiving application must access the data after SendMessage returns, it must copy the data into a local buffer.
See Also
PostMessage, SendMessage, COPYDATASTRUCT
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
|
