convertion(very urgent)

Question

hai

i have some problem 

dim rng As Word.Range = aDoc.Range(Start:=0, End:=0)

 Dim sourceFile As FileStream = New FileStream(FILENAME, FileMode.Open, FileAccess.Read)

Dim FileSize As Long

FileSize = sourceFile.Length

Dim getContent As Byte()

getContent = New BinaryReader(sourceFile).ReadBytes(FileSize)

sourceFile.Close()

rng = getContent----> my problem here

EntireFile = rng.Text

how to copy binary  data   to word file 

plz help