|
IROTData::GetComparisonData
Retrieves data from a moniker that can be used to test the moniker for
equality against another moniker.
HRESULT GetComparisonData(
PVOID *ppvData,
| //Buffer that receives the comparison data
| ULONG cbMax,
| //Specifies length of buffer
| PULONG pcbData
| //Receives the length of the comparison data
| );
|
|
Parameters
ppvData
[out] Points to a buffer that receives the comparison data.
cbMax
[in] Specifies the length of the buffer specified in ppvData.
pcbData
[out] Receives the length of the comparison data.
Return Values
S_OK
The comparison data was successfully returned.
E_OUTOFMEMORY
The buffer contained insufficient space to return the comparison data.
Comments
The IROTData::GetComparisonData method is primarily called by the Running Object Table (ROT). The comparison
data returned by the method is tested for binary equality against the
comparison data returned by another moniker. The pcbData parameter enables the ROT to locate the end of the data returned.
Notes to Implementors
The comparison data that you return must uniquely identify the moniker, while
still being as short as possible. The comparison data should include
information about the internal state of the moniker, as well as the moniker's CLSID. For
example, the comparison data for a file moniker would include the pathname
stored within the moniker as well as the CLSID of the file moniker implementation.
This makes it possible to distinguish two monikers that happen to store similar
state information but are instances of different moniker classes.
The comparison data for a moniker cannot exceed 2048 bytes in length. For
composite monikers, the total length of the comparison data for all of its
components cannot exceed 2048 bytes; consequently, if your moniker can be a component
within a composite moniker, the comparison data you return must be significantly
less than 2048 bytes.
If your comparison data is longer than the value specified by the cbMax parameter, you must return an error. Note that when IROTData::GetComparisionData is called on the components of a composite moniker, the value of cbMax becomes smaller for each moniker in sequence.
See Also
IMoniker, IRunningObjectTable
| 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
|
