Installshield 判断系统版本

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判断系统版本号有很多种方式：

1、用SYSINFO结构体获取

1. 
   
2. if ((SYSINFO.nWinMajor == 6 ) && (SYSINFO.nWinMinor >= 0)) then
   
3. 
   
4.      MessageBox ("The system is more than XP.", SEVERE);
   
5. 
   
6. else
   
7. 
   
8.      MessageBox ("The system is Window XP and before.", SEVERE);
   
9. 
   
10. endif;
    

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2、通过查询注册表来判断系统：

1. NUMBER nOS,nvResult;
   
2. STRING svOS;
   
3. 
   
4. nOS = REGDB_NUMBER;
   
5. RegDBSetDefaultRoot( HKEY_LOCAL_MACHINE );
   
6. RegDBGetKeyValueEx( "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion","CurrentVersion", nOS, svOS, nvResult);
   
7. if (svOS == "6.0") then
   
8.     MessageBox("We are on Vista!", INFORMATION);
   
9. else
   
10.     if (svOS == "5.1") then
    
11.         MessageBox("We are on XP!",INFORMATION);
    
12.     endif;
    
13. endif;

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还有一种方法是调用 GetSystemInfo函数，具体函数用法参见help文档。

Operating system	Version number	dwMajor Version	dwMinor Version	Other
Windows 7	6.1	6	1	OSVERSIONINFOEX.wProductType == VER_NT_WORKSTATION
Windows Server 2008 R2	6.1	6	1	OSVERSIONINFOEX.wProductType != VER_NT_WORKSTATION
Windows Server 2008	6.0	6	0	OSVERSIONINFOEX.wProductType != VER_NT_WORKSTATION
Windows Vista	6.0	6	0	OSVERSIONINFOEX.wProductType == VER_NT_WORKSTATION
Windows Server 2003 R2	5.2	5	2	GetSystemMetrics(SM_SERVERR2) != 0
Windows Server 2003	5.2	5	2	GetSystemMetrics(SM_SERVERR2) == 0
Windows XP	5.1	5	1	Not applicable
Windows 2000	5.0	5	0	Not applicable

Operating system	Version number	dwMajor Version	dwMinor Version	Other
Windows 7	6.1	6	1	OSVERSIONINFOEX.wProductType == VER_NT_WORKSTATION
Windows Server 2008 R2	6.1	6	1	OSVERSIONINFOEX.wProductType != VER_NT_WORKSTATION
Windows Server 2008	6.0	6	0	OSVERSIONINFOEX.wProductType != VER_NT_WORKSTATION
Windows Vista	6.0	6	0	OSVERSIONINFOEX.wProductType == VER_NT_WORKSTATION
Windows Server 2003 R2	5.2	5	2	GetSystemMetrics(SM_SERVERR2) != 0
Windows Server 2003	5.2	5	2	GetSystemMetrics(SM_SERVERR2) == 0
Windows XP	5.1	5	1	Not applicable
Windows 2000	5.0	5	0	Not applicable