PC Magazine Press Release
Business Clients: IBM, Toyota, Comcast, American Express
PCWorld Press Release
Business Clients: ESPN, Adobe, Microsoft, ebay
Wired Press Release

Hall of Fame

1. Ray_Pas...28,800
2. quicksilve...24,718
3. pgnatyuk12,700
4. pepr9,688
5. lherrou7,500
6. harfang5,500
7. mish335,200
8. ajGurkha5,000
8. XGIS5,000
10. jaime_oliv...4,500
10. ericjarvies4,500
12. cyberkiwi4,000
13. HonorGod3,800
14. pradyahuja3,500
15. dslamb2,900
16. sedgwick2,800
16. ozo2,800
16. tbsgadi2,800
16. rrz@87...2,800
16. Naser722,800
16. noxcho2,800
16. tgerbert2,800
16. -jonny-2,800
16. VanHack...2,800
25. lucas9112,700

1. imarshad134,270
2. jaime_oliv...107,134
3. vilia46,548
4. ozo39,772
5. Ray_Pas...37,268
6. lherrou30,100
7. pgnatyuk26,719
8. quicksilve...26,136
9. pepr24,232
10. BillPowell23,090
11. fulscher20,514
12. mrfixit2216,152
13. elvisthepri...15,569
14. CWise15,488
15. mish3311,340
16. oobayly11,000
17. guidway10,688
18. Mikal6139,700
19. XGIS9,500
20. maphew9,468
21. b0lsc0tt9,375
22. dslamb9,250
23. ericjarvies9,000
24. geotiger8,711
25. patrickab8,000

	[x] Posted via EE Mobile
	Search, ask, and monitor your questions on the go with EE Mobile. Visit Experts Exchange from your mobile device and never be out of touch again.

Question

	[x] Attachment Details

[x]

The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

The Grade of the Solution
The Zone Rank of the Expert Providing the Solution
The Number of Author and Expert Comments
The Number of Experts Contributing
The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

7.8

NMEA Checksum in VB6

Asked by nzfire in GIS & GPS Programming

Tags: checksum, nmea, vb6

HI,

I have the following code from the web that is in VB.Net and I am writing an app in vb6...Yes I know, I should be moving on! haha!

Could anyone give me a hand with converting it to vb6. I have a problem with the CByte vb6 function:

The following is the .Net code:

'----------------------
' Returns True if a sentence's checksum matches the calculated checksum
Public Function IsValid(ByVal sentence As String) As Boolean
' Compare the characters after the asterisk to the calculation
Return sentence.Substring(sentence.IndexOf("*") + 1) = GetChecksum(sentence)
End Function

' Calculates the checksum for a sentence
Public Function GetChecksum(ByVal sentence As String) As String
' Loop through all chars to get a checksum
Dim Character As Char
Dim Checksum As Integer
For Each Character In sentence
Select Case Character
Case "$"c
' Ignore the dollar sign
Case "*"c
' Stop processing before the asterisk
Exit For
Case Else
' Is this the first value for the checksum?
If Checksum = 0 Then
' Yes. Set the checksum to the value
Checksum = Convert.ToByte(Character)
Else
' No. XOR the checksum with this character's value
Checksum = Checksum Xor Convert.ToByte(Character)
End If
End Select
Next
' Return the checksum formatted as a two-character hexadecimal
Return Checksum.ToString("X2")
End Function
'-------------------

Thanks,

Sean

20100802-EE-VQP-174