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Borland C++ V5.02
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OCT_DLL.PAK
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DLLRUN.CPP
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C/C++ Source or Header
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1997-05-06
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4KB
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105 lines
//----------------------------------------------------------------------------
// ObjectComponents
// Copyright (c) 1994, 1996 by Borland International, All Rights Reserved
//
// Simple EXE to load and run a DLL server
//----------------------------------------------------------------------------
#define STRICT
#include <windows.h>
#include <shellapi.h>
#include <ole2.h>
#include <winsys\registry.h>
#define _IFUNC STDMETHODCALLTYPE
typedef HRESULT STDAPICALLTYPE (*TDllGetClassObject)(const GUID far& clsid,
const GUID far& iid,
void far* far* retObj);
class TDummy : public IUnknown {
HRESULT _IFUNC QueryInterface(const GUID far& iid, void far* far* pif)
{*pif = 0; return iid==IID_NULL ? NOERROR : ResultFromScode(E_NOINTERFACE);}
unsigned long _IFUNC AddRef() {return 1;}
unsigned long _IFUNC Release(){return 0;}
};
int PASCAL
WinMain(HINSTANCE/*hInst*/, HINSTANCE/*prev*/, char far* cmdLine, int/*show*/)
{
char* error = 0;
const int guidChars = 38;
const int guidKeySize = sizeof("CLSID\\")-1;
char guidBuf[guidKeySize + guidChars + 1] = "CLSID\\";
const int pathSize = 260;
char path[pathSize];
long guidBufSize = guidChars + 1;
long pathBufSize = pathSize;
HKEY key;
if (!cmdLine || !cmdLine[0]) {
cmdLine = "Error";
error = "Command line must have DLL ProgId";
}
else if (::RegOpenKey(TRegKey::ClassesRoot, cmdLine, &key) != S_OK) {
error = "ProgId not found in Registry";
}
else {
long rstat = ::RegQueryValue(key, "CLSID", guidBuf+guidKeySize, &guidBufSize);
::RegCloseKey(key);
if (rstat != S_OK ||
::RegOpenKey(TRegKey::ClassesRoot, guidBuf, &key) != S_OK) {
error = "CLSID not found in Registry";
}
else {
long rstat = ::RegQueryValue(key, "InprocServer", path, &pathBufSize);
::RegCloseKey(key);
if (rstat != S_OK) {
error = "No InprocServer specified in Registry";
}
else {
::OleInitialize(0);
HINSTANCE hLib = ::LoadLibrary(path);
if (hLib < HINSTANCE_ERROR) {
error = "Could not load library";
}
else {
TDllGetClassObject entry = (TDllGetClassObject)::GetProcAddress(hLib,
"DllGetClassObject");
if (!entry) {
error = "Could not find entry point";
}
else {
IClassFactory* factory;
GUID guid;
::CLSIDFromString(guidBuf+guidKeySize, &guid);
HRESULT stat = (*entry)(guid, IID_IClassFactory,
(void far*far*)&factory);
if (stat) {
error = "Could not obtain factory";
}
else {
IUnknown* ifc;
stat = factory->CreateInstance(&TDummy(), IID_IUnknown,
(void far*far*)&ifc);
factory->Release();
if (stat) {
error = "Could not create object";
}
else {
long refs = ifc->Release();
char buf[30];
wsprintf(buf, "Reference count = %li", refs);
if (refs != 0)
error = buf;
}
}
}
::FreeLibrary(hLib);
}
::OleUninitialize();
}
}
}
if (error)
::MessageBox(0, error, "DLLRUN - (c) Borland 1994, 1996", MB_OK);
return error != 0;
}