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Re: Calling from VB.net to a Dll Win32 function that uses safearray pointer

edmonson10-Mar-11 5:45

10-Mar-11 5:45

May be logic, but calling DLL from VB6 no safearray creation is needed.

I will continue investigating. If I find a solution, I tell you.

Regards.

Re: Calling from VB.net to a Dll Win32 function that uses safearray pointer

_Erik_10-Mar-11 5:58

10-Mar-11 5:58

Yes, you are right, but remember arrays in VB6 were allocated as SAFEARRAY under the covers, and that is quite a different thing than .NET arrays, and it seems you are using VB.NET.

Re: Calling from VB.net to a Dll Win32 function that uses safearray pointer

edmonson10-Mar-11 6:31

10-Mar-11 6:31

Sure.

But the DLL is now compiled on VS2008.

Reading about safearrays and thinking about your suggest, I've find an assembly named system.visualstudio.ole.interop on VS2008 help that implements Safearray struct.

I'll try to use it, but from now, I can't load the assembly.
It doesn't appear on Net list references, but it is present on Windows\assembly.

If I achieve to load it, I tell you about.

Regards.

vb.net with crystal reports deployment

directred7-Mar-11 1:10

7-Mar-11 1:10

Hi,

I wonder if anyone can help me.

I am setting a VB.Net (2008) with Crystal Reports (ver 10) deployment to go onto other PCs.

I have done this before but for some reason, getting a CrystalDecisions.Shared problem when I try and view a report on another PC. I have included in the project

Crystal_database_access2003.msm
Crystal_database_access2003_enu.msm
Crystal_managed2003.msm
Crystal_regwiz2003.msm

I have also made sure I have the correct licence key. This has got me baffled. I have properly missed something simple out or done something wrong this time.

How to set focus on dynamically created controls?

Floodlight6-Mar-11 16:40

6-Mar-11 16:40

Hi All,

I have a program where I dynamically create some Textboxes within a Panel on my form using this code

Panel1.Controls.AddRange(New System.Windows.Forms.Control() {TextBoxes(num - 1)})

These textboxes are automatically labeled Layer1, Layer2 etc etc.. Everything works fine.

I also have a listbox that contains the names of these dynamically created "Layers". What I want to do is when I click on the name in the listbox I want to "select" (or set the focus) on that particular dynamic control.. but I don't know how to reference it, as it's dynamic lol.

Any help would be MUCH appreciated, thanks!

Re: How to set focus on dynamically created controls?

_Erik_7-Mar-11 4:59

7-Mar-11 4:59

Use its name as you have it:

C#

Dim c as Control = Panel1.Controls[name];

Where "name" would be a string variable containing the name of the control.

Edit: Sorry, my first reply was written in C#, not VB.

Re: How to set focus on dynamically created controls?

Floodlight7-Mar-11 22:58

7-Mar-11 22:58

Thanks heaps for that Erik, it worked!! Top job Smile | :)

Smile | :)

Alpha Transparent PNG form question

FeRtoll5-Mar-11 5:46

5-Mar-11 5:46

I have problems with transparent form, can anyone help? Smile | :)

Smile | :)

problem is that its too slow Frown | :(

Frown | :(

example if i click on button where it should just switch another panel control it takes 3-4 secconds because of redrawing

Class: http://pastesite.com/22086[^]
On Form: http://pastesite.com/22087[^]

so at form load is called redraw() and if i click on a button and panel is switched i again call redraw()

form load 6 second
switching panels 3-4 seconds

thank you

FeRtoll Software.net
------------
E-Mail me
WebPage

Windows service with FileSystemWatcher

byka4-Mar-11 5:22

4-Mar-11 5:22

I am writing Windows service with FileSystemWatcher.
Protected Overrides Sub OnStart(ByVal args() As String)
fw = New StreamWriter(LogPathFile)
fsw = New FileSystemWatcher
If args.Length > 0 Then
' the path to monitor has been specified in the argument passed in at Start
fsw.Path = args(0)
Else
fsw.Path = My.Settings.PathToWatch
End If
fsw.IncludeSubdirectories = False
fsw.Filter = "*.*"
AddHandler fsw.Created, New FileSystemEventHandler(AddressOf File_Created)...

Public Sub File_Created(ByVal obj As Object, ByVal e As FileSystemEventArgs)...
How can I check on start if My.Settings.PathToWatch had any files and then call for each file File_Created event?

Re:[Cross Post]

Henry Minute4-Mar-11 5:53

4-Mar-11 5:53

Please do not ask the same question in more than one forum. Very naughty. Smile | :)

Smile | :)

Decide where it fits best and just ask there.

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”
I wouldn't let CG touch my Abacus!
When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

Re: Windows service with FileSystemWatcher

nlarson117-Mar-11 7:26

7-Mar-11 7:26

Because your turning on filesystemwatcher after the fact, you will need to handle the startup manually by getting the list of files in the directory and calling the routine for each file. Then start the filesystemwatcher.

'Never argue with an idiot; they'll drag you down to their level and beat you with experience.' ~ anonymous

'Life's real failure is when you do not realize how close you were to success when you gave up.' ~ anonymous

How to use google map in vb.net application

ejaz_pk4-Mar-11 1:03

4-Mar-11 1:03

Is there anybody who knows how to use google map in vb.net application for route optimization?

Thanks in advance

Re: How to use google map in vb.net application

Simon_Whale4-Mar-11 3:27

4-Mar-11 3:27

Google Directions API[^]

Have a look at that it might help you. You end up get through HTTP a XML Data string and have to build up from there

As barmey as a sack of badgers

Dude, if I knew what I was doing in life, I'd be rich, retired, dating a supermodel and laughing at the rest of you from the sidelines.

Re: How to use google map in vb.net application

Eddy Vluggen4-Mar-11 4:39

4-Mar-11 4:39

ejaz_pk wrote:
Is there anybody who knows how to use google map in vb.net application for route optimization?

As a sidenote, you might want to work through their terms;

Google wrote[^]:
5.2 Account Key. After supplying Google with your account information and the URL of your Maps API Implementation, and accepting the Terms, you will be issued an alphanumeric key assigned to you by Google that is uniquely associated with your Google Account and the URL of your Maps API Implementation. Your Maps API Implementation must import the Google Maps APIs using this key as described in the Maps APIs Documentation, and Google will block requests with an invalid key or invalid URL. You may only obtain and use a key in accordance with these Terms and the Maps APIs Documentation.

Point 9 and 10 could be important too, depending on the circumstances.

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Re: How to use google map in vb.net application

ejaz_pk4-Mar-11 20:48

4-Mar-11 20:48

Thanks for your reply.

Actually my next step is how to put marks on different location on the map?

Thanks in advance

Ejaz

Re: How to use google map in vb.net application

Eddy Vluggen5-Mar-11 1:36

5-Mar-11 1:36

ejaz_pk wrote:
Actually my next step is how to put marks on different location on the map?

No, your next step is research. Markers are described here[^].

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Re: How to use google map in vb.net application

ejaz_pk14-Mar-11 20:09

14-Mar-11 20:09

Thanks for the reply.

Is there a way to calculate the fastest route between multiple routes?

Thanks in advance

Regards,
Ejaz

Re: How to use google map in vb.net application

Eddy Vluggen15-Mar-11 1:48

15-Mar-11 1:48

Yup, multiple. I took the simple approach, and let the computer calculate each distance for all possible routes - assuming that the shortest one would be the fastest. Worked quite reasonably. You can find more advanced solutions by Googling for "Travelling Salesman Problem".

Good luck Smile | :)

Smile | :)

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Re: How to use google map in vb.net application

ejaz_pk15-Mar-11 19:56

15-Mar-11 19:56

Can you please give me any sample code to get any idea to get the distance and fastest route?

Thanks in advance

Re: How to use google map in vb.net application

Eddy Vluggen16-Mar-11 11:49

16-Mar-11 11:49

ejaz_pk wrote:
Can you please give me any sample code to get any idea to get the distance and fastest route?

I'm sorry, but the code is copyrighted and not mine to give. I'd have turned it into an article if it wasn't Smile | :)

Smile | :)

Would also have been too much to post as a copy&paste sample.

Simplest solution is to measure all possible distances. That requires you to build a tree with all possible routes. The root would be your startingpoint, and if you can move to two new points from there, you'd add those as children - recursively.

Once you have all possible routes, you'd have to measure how long it is, or request it's length over some third-party. If need be free, you can use the database from Geonames.org, and calculate the length of a straight line connecting each point. You'd have to account for the earth being a big round ball, but there are formulas[^] out there that return you a length of a line on a ball. Once you have written all lengths into the tree, you find the one that gives the shortest value.

That's a simplistic algorithm that'll generate relatively satisfying results. A more complicated algorithm like Dijkstra's would be an improvement. You can also improve on this by getting "real" distances from Google for the distance between two points - but that's going to cost money if you're going to do it in bulk.

Good luck Smile | :)

Smile | :)

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Ghostscript Convert PDF to TIFF with color

Tomb4213-Mar-11 3:14

3-Mar-11 3:14

Currently, I have a aVB.Net project that uses Ghostscript 9.01 to convert PDF to TIFF file.

It converts a color PDF to a grayscale TIFF.

Code Snippet
-------------
astrArgs(0) = "pdf2tif" 'The First Parameter is Ignored
astrArgs(1) = "-dNOPAUSE"
astrArgs(2) = "-dBATCH"
astrArgs(3) = "-r300"
astrArgs(4) = "-sDEVICE=tifflzw"
astrArgs(5) = "-sOutputFile=" & destDir & fileName.Substring(0, fileName.IndexOf(".")) & ".tif"
astrArgs(6) = path
output = CallGS(astrArgs)
-------------

What are the parameter(s) to convert a Color PDF to a "COLOR" TIFF?

Re: Ghostscript Convert PDF to TIFF with color

Dave Kreskowiak3-Mar-11 4:21

Dave Kreskowiak

3-Mar-11 4:21

Did you try reading the documentation on GhostScript? I found the answer in about 60 seconds by doing that. Hint, it has something to do with the DEVICE you picked. Read[^]

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

Re: Ghostscript Convert PDF to TIFF with color

Tomb4213-Mar-11 4:38

3-Mar-11 4:38

Thank you.
To share with other that might have the same question in the future.

astrArgs(4) = "-sDEVICE=tiff24nc"

Re: Ghostscript Convert PDF to TIFF with color

Dave Kreskowiak3-Mar-11 4:56

Dave Kreskowiak

3-Mar-11 4:56

I'd rather share the advice on reading the documentation than just a single POSSIBLE solution to the problem. Reading the docs allows a greater understanding of how GhostScript works than just the one statement you posted.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

email application in vb without the use of MAPI controls

K Suresh Nair3-Mar-11 1:09

3-Mar-11 1:09

Hello sir

I want to develop an email application in vb without using MAPI.
Further i want to know whether MAPI can be used without outlook.
ThankQ

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