在Setup.rul中，新增OnBegin函数
STRING str1,spath,szApplicationPath,szApplicationCmdLine,szCmdLine;
function OnBegin()
begin
// TO DO: you may change default non-UI setting, for example
//
// You may also perform your custom initialization steps, check requirements, etc.
Disable(BACKBUTTON);
if(!MAINTENANCE)then
SdLicense2("License","","",SUPPORTDIR^"协议.txt",FALSE);
endif;
//------------------------------------------------------------------------------------
szApplicationPath = WINSYSDIR ^ "msiexec.exe";
szApplicationCmdLine = "/i c:\\mysql.msi";
LongPathToQuote( szApplicationPath, TRUE );
szCmdLine = szApplicationPath + " " + szApplicationCmdLine;
RegDBSetDefaultRoot(HKEY_LOCAL_MACHINE);
MessageBox ("You are here", INFORMATION);
if(RegDBKeyExist("SOFTWARE\\MySQL AB\\MySQL Connector/ODBC 5.2 64bit(community edition)")<0)then
MessageBox ("You are here1", INFORMATION);
MessageBox(PROGRAM,INFORMATION);
MessageBox(SRCDIR,INFORMATION);
MessageBox(szCmdLine,INFORMATION);
LaunchAppAndWait("",szCmdLine, LAAW_OPTION_WAIT);
endif;
end;功能：在安装时，出现许可证后检测是否系统中安装必要的组件，如果没有安装就提示安装。有，则跳过。当必要组件是.exe的文件。直接加载到support中即可。如果是.msi后缀的文件需要调用window installer来安装。用到的函数是LaunchAppAndWait(szProgram, szCmdLine, nOptions )
szProgram:Specifies the complete path and file name of the application to be launched.
szCmdLine:Specifies the command-line parameters to pass to the launched application.
nOptions:LAAW_OPTION_WAIT----Passed through the function to WaitForApplication.
