|
Terminating a Data Link
If the client requests that a specific data link be terminated, the client
sends the server a WM_DDE_UNADVISE message, as shown in the following example.
if ((atomItem = GlobalAddAtom(szItemName)) != 0) {
if (!PostMessage(hwndServerDDE,
WM_DDE_UNADVISE,
(WPARAM) hwndClientDDE,
PackDDElParam(WM_DDE_UNADVISE, 0, atomItem))) {
GlobalDeleteAtom(atomItem);
FreeDDElParam(WM_DDE_UNADVISE, lParam);
}
}
if (atomItem == 0) {
.
. /* error handling */
.
}
The server checks whether the client currently has a link to the specific item
in this conversation. If a link exists, the server sends the client a positive WM_DDE_ACK message; the server is then no longer required to send updates about the
item. If no link exists, the server sends the client a negative WM_DDE_ACK message.
The WM_DDE_UNADVISE message specifies a data format. A format of zero informs the server to stop
all links for the specified item, even if several hot links are established and
each uses a different format.
To terminate all links for a conversation, the client application sends the
server a WM_DDE_UNADVISE message with a null item atom. The server determines
whether the conversation has at least one link currently established. If a link
exists, the server sends the client a positive WM_DDE_ACK message; the server
then no longer has to send any updates in the conversation. If no link exists, the
server sends the client a negative WM_DDE_ACK message.
| 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 projectsDmitry Vasiliev (just.dmitry)
Related LinksSoftware for Visual Studio .NET developers
Software for Delphi and C++ Builder developers
Software for Visual Basic 6 developers
Delphi Tips&Tricks
MegaDetailed.NET 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
|
