Search the text file using vbscript.

Hi I have some data in my text file. Below is the content. Now I need to search the file whether it contains identityType as ApplicationPoolIdentity. Any help in vbscript???

 name:"example"
 queueLength:"1000"
 autoStart:"true"
 enable32BitAppOnWin64:"false"
 managedRuntimeVersion:"v2.0"
 managedRuntimeLoader:"webengine4.dll"
 enableConfigurationOverride:"true"
 managedPipelineMode:"Integrated"
 CLRConfigFile:""
 passAnonymousToken:"true"
 startMode:"OnDemand"
 [processModel]
   identityType:"ApplicationPoolIdentity"
   userName:""
   password:""
   loadUserProfile:"false"