hi,not sure bout conversion frm tourist visa to residency,but if you have a RP,you cud get your spouse visit visa converted to family visa ..but u have to finish formalities like medical(within a month of arrival),and then the fingerprint/cid .for family residency visa..if you meet all the necesssary criteria required..its not too much of a hassle,excpt nowadays the waiting may take time for issuing the initial family visit visa.. for family visit or residency,you would require a letter from ur company,so anyways better to spk to ur ofc person in the concerned dept.