易语言如何连接mysql数据库操作系统

Declare Function LoadLibrary Lib "kernel32.dll" Alias "LoadLibraryA" (ByVal lpLibFileName As Long) As Long
Declare Function GetProcAddress Lib "kernel32.dll" (ByVal hModule As Long, ByVal lpProcName As String) As Long
Declare Function SQLAllocHandle Lib "odbccp32.dll" (ByVal HandleType As Long, ByVal InputHandle As Long, ByRef OutputHandle As Long) As Long
Declare Function SQLDriverConnect Lib "odbccp32.dll" (ByVal hdbc As Long, ByVal hwnd As Long, ByVal szConnStrIn As String, ByVal cbConnStrIn As Long, ByRef szConnStrOut As Any, ByVal cbConnStrOutMax As Long, ByRef pcbConnStrOut As Long, ByVal fDriverCompletion As Long) As Long
Declare Function SQLExecDirect Lib "odbccp32.dll" (ByVal hstmt As Long, ByVal szSqlStr As String, ByVal cbSqlStr As Long) As Long
Declare Function SQLFetch Lib "odbccp32.dll" (ByVal hstmt As Long) As Long
Declare Function SQLGetData Lib "odbccp32.dll" (ByVal hstmt As Long, ByVal icol As Long, ByVal itype As Long, ByVal rgbValue As Any, ByVal cbValueMax As Long, ByRef pcbValue As Long) As Long
Declare Function SQLDisconnect Lib "odbccp32.dll" (ByVal hdbc As Long) As Long
Declare Function SQLFreeHandle Lib "odbccp32.dll" (ByVal HandleType As Long, ByVal Handle As Long) As Long

' 加载ODBCCP32.DLL库
Dim hModule As Long
hModule = LoadLibrary("C:\Windows\System32\odbccp32.dll")

' 获取函数入口地址
Dim addrSQLAllocHandle As Long
addrSQLAllocHandle = GetProcAddress(hModule, "SQLAllocHandle")
' ... 其他函数入口的获取

' 创建连接句柄
Dim henv As Long
Dim hdbc As Long
SQLAllocHandle(1, 0, henv)
SQLAllocHandle(2, henv, hdbc)

' 连接到MySQL数据库
Dim connStr As String
connStr = "DRIVER={MySQL ODBC 8.0 Unicode Driver};SERVER=localhost;DATABASE=test;UID=root;PWD=123456;OPTION=3;"
SQLDriverConnect(hdbc, 0, connStr, Len(connStr), ByVal 0, 0, ByVal 0, 0)

' 执行SQL查询语句
Dim sqlQuery As String
sqlQuery = "SELECT * FROM table"
SQLExecDirect(hstmt, sqlQuery, Len(sqlQuery))

' 获取查询结果集数据
While SQLFetch(hstmt) = 0
    Dim data As String
    SQLGetData(hstmt, 1, 1, ByVal data, Len(data), ByVal 0)
    ' 处理数据...
Wend

' 关闭连接和释放资源
SQLDisconnect(hdbc)
SQLFreeHandle(1, henv)
SQLFreeHandle(2, hdbc)