在VFP中获取Windows注册信息的方法

关键词：

在Visual Foxpro软件的程序设计中，我们经常需要关注其程序设计的环境，尤其是获得Windows软件系统注册的用户名及单位名称。为此我们设计了一个在Windows 3.X、Window 95、Windows 98及Windows NT 4.0环境下均通用的一个子程序，可以满足上述的需要。

#DEFINE MACHINE_ID -2147483646

#DEFINE VER_PATH "Software\Microsoft\Windows\CurrentVersion"

*--声明Windows API 函数

DECLARE INTEGER GetProfileString IN Win32API AS GetProStr ;

String cSection, String cKey, String cDefault, ;

String @cBuffer, Integer nBufferSize

*-- 声明注册表函数

DECLARE Integer RegOpenKeyEx IN Win32API ;

Integer nKey, String @cSubKey, Integer nReserved,;

Integer nAccessMask, Integer @nResult

DECLARE Integer RegQueryValueEx IN Win32API ;

Integer nKey, String cValueName, Integer nReserved,;

Integer @nType, String @cBuffer, Integer @nBufferSize

DECLARE Integer RegCloseKey IN Win32API ;

Integer nKey

*-- 初始化DLL调用变量

OutBuffer = SPACE(128)

STORE 0 TO Reserved, Result, Type

BufferSize = LEN(OutBuffer)

STORE "" TO OutUser, OutCompany

*-- 通过VFP的OS()函数判定当前操作系统类型

DO CASE

CASE UPPER(OS()) = "WINDOWS 4"

*-- 系统为Windows 95 以上版本

Error = RegOpenKeyEx(MACHINE_ID, VER_PATH, ;

Reserved, 1, @Result)

IF Error = 0

Type = 0

OutBuffer = SPACE(128)

BufferSize = LEN(OutBuffer)

Error = RegQueryValueEx(Result, "RegisteredOwner", Reserved, ;

@Type, @OutBuffer, @BufferSize)

IF Error = 0 AND OutBuffer <> CHR(0)

OutUser = LEFT(OutBuffer, BufferSize - 1)

ENDIF

Type = 0

OutBuffer = SPACE(128)

BufferSize = LEN(OutBuffer)

Error = RegQueryValueEx(Result, "RegisteredOrganization", Reserved, ;

@Type, @OutBuffer, @BufferSize)

IF Error = 0 AND OutBuffer <> CHR(0)

OutCompany = LEFT(OutBuffer, BufferSize - 1)

ENDIF

ENDIF

=RegCloseKey(Result)

CASE UPPER(OS()) = "WINDOWS NT"

*-- 系统为Windows NT

Error = RegOpenKeyEx(MACHINE_ID, KEY_SHARED_TOOLS_LOCATION, ;

Reserved, 1, @Result)

IF Error = 0

Type = 0

OutBuffer = SPACE(128)

BufferSize = LEN(OutBuffer)

Error = RegQueryValueEx(Result, "RegisteredOwner", Reserved, ;

@Type, @OutBuffer, @BufferSize)

IF Error = 0 AND OutBuffer <> CHR(0)

OutUser = LEFT(OutBuffer, BufferSize - 1)

ENDIF

Type = 0

OutBuffer = SPACE(128)

BufferSize = LEN(OutBuffer)

Error = RegQueryValueEx(Result, "RegisteredOrganization", Reserved, ;

@Type, @OutBuffer, @BufferSize)

IF Error = 0 AND OutBuffer <> CHR(0)

OutCompany = LEFT(OutBuffer, BufferSize - 1)

ENDIF

ENDIF

=RegCloseKey(Result)

OTHERWISE

*-- 系统为Windows 3.X 版本

OutRetVal = GetProStr("MS USER INFO", "DEFNAME", "", @OutBuffer, BufferSize)

OutUser = LEFT(OutBuffer, OutRetVal)

OutRetVal = GetProStr("MS USER INFO", "DEFCOMPANY", "", @OutBuffer,BufferSize)

OutCompany = LEFT(OutBuffer, OutRetVal)

ENDCASE

If Error = 0

=MessageBox("用户：" + OutUser + Chr(13) + "单位：" + OutCompany)

Else

=MessageBox("未找到用户及单位。")

Endif