Mobile Discussion Boards

gundamhamtaro6-May-05 1:08

6-May-05 1:08

i want to call a printer thats connected to a terminal that my PDA is connected to, so that i can print stuff on my PDA. how do i do that in coding? and is there any support for printer stuff in vb.net? i'm using it to develop a smart device application for my pda. thanks!

Fast pixel drawing on VB.net CF or C#

CarlosMMartins5-May-05 5:27

CarlosMMartins

5-May-05 5:27

Hi,

I need to draw a dynamically generated 256x256 grayscale bitmap on screen.
Drawing it "pixel by pixel" is extremely slow. (several seconds)
Drawing it on an ofscreen bitmap and then blitting it on screen is slightly faster, but still unaceptable.

On the full framework I got around to accessing the bitmap data, and accessing the pixels directly, giving instant results.
Is there any way to achive this on the Compact Framework?
(or any other method that works...)

If the "AddressOf" worked for the bitmap, so I could get a IntPtr to it, I think I could then go in there and set the pixel data myself... But I was unable to find a way to do that.
(will C# do the trick?)

The current code:

Dim ImgRAW(256, 256) As Byte
' GetImage(Imgraw) '... Fill up dynamic image
Dim offbmp As New Bitmap(256, 256)
For scan = 1 To 255
For x = 1 To 255
t = ImgRAW(scan, x)
offbmp.SetPixel(x, scan, Color.FromArgb(t, t, t))
Next
Next
oG.DrawImage(offbmp, 400, 100)

Hope someone can help,
Thanks.

Location information

dboytime3-May-05 23:52

dboytime

3-May-05 23:52

Hi...I'm working on the windows mobile 2003 platform (e200 spv) and would like to get the phones' location info and write it to a txt file.

Any suggestions?

dboy.spv

Stuck w/ a simple ReadFile?!!!

georgiek503-May-05 16:19

georgiek50

3-May-05 16:19

I thought I would post this here because I can't spot the error. This is my first attempt to code for a Pocket PC. The following code works fine on the desktop:

TCHAR szFilePath[MAX_PATH];
wsprintf(szFilePath, TEXT("%sTest.txt"), this->szAppRootDirectory);
	
HANDLE hFile = CreateFile(szFilePath, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);

if ( hFile == INVALID_HANDLE_VALUE )
{
   MessageBox(hwnd, TEXT("Fatal error: Unable to open file."), NULL, MB_OK);
   return R_ERROR;
}

DWORD dwBytesRead;
DWORD dwFileSize = SetFilePointer(hFile, 0, NULL, FILE_END);
TCHAR *szBuffer = new TCHAR[dwFileSize + 1];
SetFilePointer(hFile, 0, NULL, FILE_BEGIN);
ReadFile(hFile, szBuffer, dwFileSize, &dwBytesRead, NULL);

CloseHandle(hFile);

szBuffer[dwFileSize] = '\0';

Unfortunatelly, szBuffer fills w/ garbage (boxes) on the Pocket PC. Can anyone spot the error here? Thanks in advance.

Re: Stuck w/ a simple ReadFile?!!!

GDavy8-May-05 21:40

GDavy

8-May-05 21:40

Wouldn`t GetFileSize be an easier way to get the size of the file then moving the filepointer around?

The fact that boxes are displayed could be that the characters in the file are ANSI characters(1byte) and you compiled your application for Unicode (TCHAR is then a wide char (2byte) ), or the other way around...
Or the file contains unicode characters that are not supported by the font on your device...
Hope this can help you further...

Greetings,
Davy

Re: Stuck w/ a simple ReadFile?!!!

georgiek5010-May-05 6:24

georgiek50

10-May-05 6:24

That was the problem. Thanks.

WM2003 to PPC2002 with eVC4

hopgun1-May-05 21:59

hopgun

1-May-05 21:59

Hello,

I wrote a software for WM2003 with eVC4 in C++. I post it in PocketPCFreeware here http://www.pocketpcfreewares.com/fr/index.php?soft=1299. Sorry it's in french but I plan to translate it in english.

Some users ask me the compatibility of the software with PPC2002: it doesn't work. I forgot something ? Have I to compile the soft with eVC3 ? Is there a problem with the compack framework (it doesn't work with it) ? Have I to add some DLL's ?

Please help me ...

Best regards

PS: sorry about my bad english Smile | :)

Re: WM2003 to PPC2002 with eVC4

João Paulo Figueira2-May-05 3:47

João Paulo Figueira

2-May-05 3:47

hopgun wrote:
Have I to compile the soft with eVC3 ?

Most likely, yes. But there is one undocumented alternative:
Migrating to the eVC 4.0 Environment[^]

Regards,
João Paulo Figueira
Embedded MVP

display bmp on pocket pc

sasi_ps29-Apr-05 1:03

sasi_ps

29-Apr-05 1:03

hi all,
i am trying to display a bmp image on xda o2.i have used bitblt function to display the source on the screen.....
but when i port it to the xda....it doesnot show up....
can u help with that.....

sasi

Re: display bmp on pocket pc

Mahesh J. Chavda3-May-05 1:51

Mahesh J. Chavda

3-May-05 1:51

Hello,
Try following:
m_ctlTxtPicture.SetBitmap( ::LoadBitmap(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDI_BMP_SUCCESS)) );

Here,
--> m_ctlTxtPicture is a control variable of Picture Control (Container for
the bitmap)
--> IDI_BMP_SUCCESS is resource ID for the bitmap.

Thank you

Mahesh J. Chavda

Re: display bmp on pocket pc

sasi_ps5-May-05 21:03

sasi_ps

5-May-05 21:03

thanks for reply.
actually i am trying to port the application on arm processor O2 xda model(pocket pc 2000).
it shows on the emulator but not on the pocket pc.is ther anything else i have to change...to port on arm processor????

sasi

Re: display bmp on pocket pc

andrewtory@163.com5-May-05 20:28

andrewtory@163.com

5-May-05 20:28

o2.i???

which pocket pc?

hithesh25-Apr-05 19:59

hithesh

25-Apr-05 19:59

I am building an application for pocket pc - Infra red TV remote using pocket pc.
Which pocket pc do you recommend? The OS should be win CE 3.0

Re: which pocket pc?

sasi_ps29-Apr-05 1:04

sasi_ps

29-Apr-05 1:04

i would recommend pocket pc 2000 and 2002 .

sasi

wince device drivers

Iliyas24nie25-Apr-05 5:39

Iliyas24nie

25-Apr-05 5:39

I want a write driver iam new to this field can any one give me flow how to write a device driver in wince

Please do...

Sreekanth Muralidharan20-Apr-05 20:18

Sreekanth Muralidharan

20-Apr-05 20:18

Hello
it would be very helpful for beginners like me, if any body could post an article on in WinCE Development.
Regards
Sreekanth Muralidharan
Hyderabad

PowerPC based board...

zeki yugnak20-Apr-05 10:24

zeki yugnak

20-Apr-05 10:24

are there anyone who worked with PowerPC based boards like Matrox Odyssey? Confused | :confused:

if there is, I want to ask a few question?

Matrox boards;
http://www.matrox.com/imaging/products/vision_processors.cfm[^]

converting string to float in eVC++. Help asap.

hithesh20-Apr-05 5:27

hithesh

20-Apr-05 5:27

Hi guys,

I am using strtod() function to convert a string "123.4" to float 123.4
It works fine in VC++. But when I enter the same code in evc++, its giving me the following error-

error C2664: 'strtod' : cannot convert parameter 1 from 'class CString' to 'const char *'
No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called

My code:

char *stop;

UpdateData (TRUE);
input=strtod(m_display, &stop);
x=input;

m_display is the CString variable, input is double.

I type casted the m_display -
input=strtod((LPCTSTR)m_display, &stop);

I got this error -

error C2664: 'strtod' : cannot convert parameter 1 from 'const unsigned short *' to 'const char *'
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast

I am having major problems since yesterday night. totally frustrating! The float to string gives me error too.

-hithesh

Re: converting string to float in eVC++. Help asap.

Mike Dimmick20-Apr-05 6:12

Mike Dimmick

20-Apr-05 6:12

You've defined UNICODE. This means that CString manages an array of WCHARs, not of chars.

To handle this behaviour-switching between UNICODE being defined and not defined, use the macros in tchar.h. The documentation for each wrapped function shows the equivalent tchar.h name under "Generic-Text Routine Mappings". For strtod, the equivalent API that operates on TCHARs is _tcstod.

Stability. What an interesting concept. -- Chris Maunder

Re: converting string to float in eVC++. Help asap.

hithesh20-Apr-05 6:15

hithesh

20-Apr-05 6:15

Mike,

Thanks. So instead of strtod, I use _tcstod?
I am a VC++ newbie. an example would be great.

thanx.

-hithesh

Loading images as embedded resource: How to optimize

monicapinto19-Apr-05 23:56

monicapinto

19-Apr-05 23:56

Hi!!!

I have a pda application that uses a dll that I made.

That dll has some images that i load as an embedded resource, when i run the application, it takes some time t load all images and i can see in the emulator the images loading... What can I do to make the images load at the same time??

Thanks in advance

Re: Loading images as embedded resource: How to optimize

CarlosMMartins5-May-05 5:25

CarlosMMartins

5-May-05 5:25

The best solution I found, when loading a lot of images when the program starts, was to display a splash screen with a progressbar.
That way, the few seconds it taks to load seem to go faster.

Manage Pocket PC Network Connection

Ariston Darmayuda19-Apr-05 6:48

Ariston Darmayuda

19-Apr-05 6:48

I Have two problem to manage Pocket PC 2002 Network Connection :

1st. I have create Bluetooth application and it's work fine when bluetooth is active. But when inactive my application is always error. How can i detect Bluetooth is active or not by software, and also how can i activate bluetooth manually by my software ?

2nd. I try to send data by GPRS, it always succeed when GPRS is active. But when GPRS is inactive it's always error. So how to create software to configure the GPRS connection and connect the GPRS manually without using Net.WebRequest and CMHELPER ?

Thank's for support.

Network shares on CE devices?

Member 126147418-Apr-05 4:49

Member 1261474

18-Apr-05 4:49

I am a novice to Windows CE so sorry in advance if this is a stupid question.

We just got an Itronix Q200 with WindowsCE 4.2 and I would like to be able to set up a folder on this device as being shared on the network so that a desktop pc can access this folder (via \\IPaddr\sharename) so that an app that runs on the desktop pc can do file transfers with the device. I can ping the device from the desktop pc and can ping the desktop pc from the device so the device is communicating on the network, but I don't know how to set up a share on the device. My app needs this share to do the file transfers.

Is this possible?

Thanks, gary

GPRS & Phone Compatability Issues

SeanBryant17-Apr-05 19:10

SeanBryant

17-Apr-05 19:10

I'm having problems receiving and making phone calls whilst a GPRS session is active. I'm using third part components to programatically make the RAS connection (in C#), but when a phone call is made or received the connection utility is locked out and cannot make another successful connection until the device is reset. Even manual connections cannot be done until the device is reset. I have tried connecting manually, and when a phone call is made or received the GPRS session is simply suspended, and reactivates when the phone call is over. I have tested several third party components and they all have the same problem. One of them said there was nothing they could do about it as it was a problem with the RAS DLL. Is this true? Is it not possible to programatically create a GPRS connection via the RAS DLL whilst also being compatible with phone usage? Does anyone know a way around this problem?

Sean

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