Palce CrystalReportViewer Object on ur form and name it to 
objCrystalReportViewer 
drag a button on to the same name it to btnTemp
on btnTemp click write the following lines of code

dim rdReportToPrint as new 
CrystalDecisions.CrystalReports.Engine.ReportDocument()
rdReportToPrint.Load("write the path were in u have save ur 
report here" )

objCrystalReportViewer.ReportSource = rdReportToPrint;

this is the way we load crystalreport dynamically