99 lines
2.4 KiB
C++
99 lines
2.4 KiB
C++
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/*++
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Copyright (C) 1996-1999 Microsoft Corporation
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Module Name:
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cathelp.cpp
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Abstract:
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Component category implementation.
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--*/
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#include "comcat.h"
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// Helper function to create a component category and associated description
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HRESULT
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CreateComponentCategory (
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CATID catid,
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WCHAR* catDescription )
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{
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CATEGORYINFO catinfo;
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ICatRegister* pcr = NULL ;
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HRESULT hr = S_OK ;
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SIZE_T len;
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hr = CoCreateInstance(CLSID_StdComponentCategoriesMgr,
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NULL, CLSCTX_INPROC_SERVER, IID_ICatRegister, (void**)&pcr);
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if (FAILED(hr))
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return hr;
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// Make sure the HKCR\Component Categories\{..catid...}
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// key is registered
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catinfo.catid = catid;
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catinfo.lcid = 0x0409 ; // english
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// Make sure the provided description is not too long.
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// Only copy the first 127 characters if it is
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len = wcslen(catDescription);
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if (len>127)
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len = 127;
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wcsncpy(catinfo.szDescription, catDescription, len);
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// Make sure the description is null terminated
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catinfo.szDescription[len] = '\0';
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hr = pcr->RegisterCategories(1, &catinfo);
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pcr->Release();
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return hr;
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}
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// Helper function to register a CLSID as belonging to a component category
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HRESULT RegisterCLSIDInCategory(REFCLSID clsid, CATID catid)
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{
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// Register your component categories information.
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ICatRegister* pcr = NULL ;
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HRESULT hr = S_OK ;
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hr = CoCreateInstance(CLSID_StdComponentCategoriesMgr,
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NULL, CLSCTX_INPROC_SERVER, IID_ICatRegister, (void**)&pcr);
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if (SUCCEEDED(hr))
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{
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// Register this category as being "implemented" by
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// the class.
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CATID rgcatid[1] ;
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rgcatid[0] = catid;
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hr = pcr->RegisterClassImplCategories(clsid, 1, rgcatid);
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}
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if (pcr != NULL)
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pcr->Release();
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return hr;
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}
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// Helper function to unregister a CLSID as belonging to a component category
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HRESULT UnRegisterCLSIDInCategory(REFCLSID clsid, CATID catid)
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{
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ICatRegister* pcr = NULL ;
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HRESULT hr = S_OK ;
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hr = CoCreateInstance(CLSID_StdComponentCategoriesMgr,
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NULL, CLSCTX_INPROC_SERVER, IID_ICatRegister, (void**)&pcr);
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if (SUCCEEDED(hr))
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{
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// Unregister this category as being "implemented" by
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// the class.
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CATID rgcatid[1] ;
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rgcatid[0] = catid;
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hr = pcr->UnRegisterClassImplCategories(clsid, 1, rgcatid);
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}
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if (pcr != NULL)
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pcr->Release();
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return hr;
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}
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