Private Type ThePicInfo
Type As String
Width As Long
Height As Long
End Type

Private Function CheckPicSpecs(TheFile) As ThePicInfo
Dim TheContent, TheImageInfo As ThePicInfo, TheVar, TheFreeFile
TheFreeFile = FreeFile
Open TheFile For Binary As TheFreeFile
TheContent = Input(10, TheFreeFile)
Close TheFreeFile
If Mid(TheContent, 7, 4) = "JFIF" Then TheImageInfo.Type = "JPG" Open TheFile For Binary As TheFreeFile
TheContent = Input(167, TheFreeFile)
Close TheFreeFile
TheImageInfo.Height = Asc(Mid(TheContent, 165, 1)) + 256 * Asc(Mid(TheContent, 164, 1))
TheImageInfo.Width = Asc(Mid(TheContent, 167, 1)) + 256 * Asc(Mid(TheContent, 166, 1))
End If
If Mid(TheContent, 1, 3) = "GIF" Then
TheImageInfo.Type = "GIF"
TheImageInfo.Width = Asc(Mid(TheContent, 7, 1)) + 256 * Asc(Mid(TheContent, 8, 1))
TheImageInfo.Height = Asc(Mid(TheContent, 9, 1)) + 256 * Asc(Mid(TheContent, 10, 1))
End If
CheckPicSpecs = TheImageInfo
End Function

Private Sub Command1_Click()
Dim a As ThePicInfo
'в качестве параметра функции CheckPicSpecs установите путь к вашей картинке
a = CheckPicSpecs("D:\garbage\way2house.gif")
MsgBox a.Type
MsgBox a.Width
MsgBox a.Height
End Sub