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85 lines
2.6 KiB
85 lines
2.6 KiB
//+----------------------------------------------------------------------------
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//
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// File: nativecm.cpp
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//
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// Module: CMSETUP.LIB
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//
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// Synopsis: Implementation of the CmIsNative function.
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//
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// Copyright (c) 1999 Microsoft Corporation
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//
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// Author: quintinb Created 01/14/99
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//
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//+----------------------------------------------------------------------------
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#include "cmsetup.h"
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#include "reg_str.h"
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//+----------------------------------------------------------------------------
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//
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// Function: CmIsNative
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//
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// Synopsis: This function Returns TRUE if CM is native to the current OS.
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//
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// Arguments: None
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//
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// Returns: BOOL - TRUE if CM is native.
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//
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// History: Created Header 1/17/99
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// quintinb NTRAID 364533 -- Changed IsNative so that Win98 SE won't be
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// considered Native even if CmNative is set to 1. See below
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// and the bug for details.
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//
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//+----------------------------------------------------------------------------
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BOOL CmIsNative()
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{
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static BOOL bCmNotNative = -1;
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if (-1 == bCmNotNative)
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{
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const TCHAR* const c_pszRegCmNative = TEXT("CmNative");
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HKEY hKey;
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DWORD dwCmNative;
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ZeroMemory(&dwCmNative, sizeof(DWORD));
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if (ERROR_SUCCESS == RegOpenKeyEx(HKEY_LOCAL_MACHINE, c_pszRegCmAppPaths, 0, KEY_READ, &hKey))
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{
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DWORD dwSize = sizeof(DWORD);
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DWORD dwType = REG_DWORD;
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if (ERROR_SUCCESS == RegQueryValueEx(hKey, c_pszRegCmNative, NULL, &dwType,
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(LPBYTE)&dwCmNative, &dwSize))
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{
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CPlatform cmplat;
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if (cmplat.IsWin98Sr())
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{
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//
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// We no longer want Win98 SE to be native even though the key was set and
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// CM is a system component. However, we may want to give ourselves an out
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// someday so if CmNative is set to 2 on win98 SE we will still consider it Native.
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// We hopefully will never need this but we might.
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//
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bCmNotNative = (2 != dwCmNative);
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}
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else
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{
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bCmNotNative = (dwCmNative ? 0 : 1);
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}
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}
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else
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{
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bCmNotNative = 1;
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}
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RegCloseKey(hKey);
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}
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else
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{
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bCmNotNative = 1;
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}
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}
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return !bCmNotNative;
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}
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