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I'm having a problem with CryptAcquireContext in a .NET Compact Framework application running on the Pocket PC Emulator 2002. On a Pocket PC 2003 Second Edition (a real device) it seems to work fine.
The line of code I'm having a problem with is:
WinApi.CryptAcquireContext(ref hProv, null,
"Microsoft Enhanced Cryptographic Provider v1.0",
1,
0xf0000000);
WinApi is a class that contains the definition of all the PInvoked
methods.
[DllImport("coredll.dll")]
public static extern bool CryptAcquireContext(
ref IntPtr phProv, string pszContainer, string pszProvider,
uint dwProvType, uint dwFlags);
The problem is that on my machine, running the code produces an error 0x80000005
When I tried the code on a collegues machine, her Pocket PC 2002 Emulator produced a differernt error message. She got 0x80090019 on the same function call. I don't understand why there is a difference - both should be set up identically, but I guess there is something different that neither of us is aware of.
Finally, we tried to deploy it to a real Pocket PC device (PPC 2003 Second Edition) and it worked fine.
I need the code to work on PPC 2002 onwards. Does anyone have any idea why I am seeing different results? Or have any idea of how to fix this?
My: Blog | Photos
"Man who stand on hill with mouth open will wait long time for roast duck to drop in." -- Confucious
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0x80000005 - Invalid pointer.
0x80090019 - The keyset is not defined.
WinCE uses unicode, shouldn't you have L"Microsoft Enhanced Cryptographic Provider v1.0".
Or better yet, use the #defines in crypt i.e. MS_ENHANCED_PROV (MS_ENHANCED_PROV_W).
[EDIT]
Also, for the keyset error you should just create a new one:
bool rc = ::CryptAcquireContextW(&hnd, ct, MS_DEF_RSA_SCHANNEL_PROV_W, PROV_RSA_SCHANNEL, F);
if( !rc ) {
ulong err = GetLastError();
if( err == NTE_BAD_KEYSET ) {
rc = ::CryptAcquireContextW(&hnd, ct, MS_DEF_RSA_SCHANNEL_PROV_W, PROV_RSA_SCHANNEL, F|CRYPT_NEWKEYSET);
if( !rc ) err = GetLastError();
}
}[/EDIT]
[EDIT2]
Ok, Ignore the first EDIT, it's the same as shown in the MSDN docs (which i assume you've seen).
It's also for error 0x80090016 - Keyset does not exist.
From:
http://support.microsoft.com/default.aspx?scid=kb;en-us;238187[^]
NTE_KEYSET_NOT_DEF (0x80090019):
The Crypto Service Provider (CSP) may not be set up correctly. Use of Regsvr32.exe on CSP DLLs (Rsabase.dll or Rsaenh.dll) may fix the problem, depending on the provider being used.
So i would guess that the coding error is 0x80000005, and that her machine doen't get to that point because it's not setup right.
[/EDIT2]
...cmk
Save the whales - collect the whole set
-- modified at 9:35 Friday 25th November, 2005
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This call(recvfrom) is waiting infinitely and the application never comes to next line.
I'm using UDP sockets. The data has been sent successfully to server. But I'm facing problem while receiving it. I tested on both smartphone emulator and real device(samsung). In both targets, the application is crashing when it reaches this line. Any idea why it's happening?. Your help is greatly appreciated.
i = recvfrom(s1,packetbuffer,sizeof(packetbuffer),0,(SOCKADDR *)&addr,&cbRemoteAddrSize);
Zxczc
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Yes he is right. VC++ is quite difficult to USE. Many times 1 line code is .net is replaced with 10 lines code in VC++. I suggest you to learn VB.NET or Embedded vb. According to my experiance VB.net is better for Embedded Development
Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com
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Hello
I own a Pocket PC 2003 with Arabic language support in it. I want to know how can I add other languages support in like. Both reading and writing(with keyboard-layouts).
Thanx in advance
Ahmad Zafar
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 Help!!!
Dear some one there...,
Im beginer VB.Net, still learning to create database application in Win CE.Net following this tutor:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnroad/html/road05222002.asp
in my VB.Net I can't found the reference object for System.Data.SqlServerCe.Engine
but I got obeject System.Data.SqlServerCe.SqlCeEngine there, so I have edited line of code from ...SqlServerCe.Engine to be ...SqlServerCe.SqlCeEngine.
Is my step is right?
Build... succeeded, no error.
Then, I have copy "nortwind Mobile.exe" file from "Debug" folder to my PDA, right?
But, when the application executed, I got the error message like this (on the PDA Win CE.Net):
"Error
An unexpected error has occured in Northwind Mobile.exe."
Detail:
"Error
Northwind Mobile.exe
ArgumentException
Could not find resource assembly
...."
Whats wrong? 
Should I have SQL Server CE installed in my PDA Win CE.Net?
Zakiah
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You might need the VB Runtime (or the .Net Compact Framework files) installed on your PPC....
Have you tried to deploy it directly to your pocket pc?
Not sure if this will help, but maybe get you moving in the right direction.
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This call is waiting infinitely and the application never comes to next line.
I'm using UDP sockets. The data has been sent successfully to server. But I'm facing problem while receiving it. I tested on both smartphone emulator and real device(samsung). In both targets application is crashing when it reaches this line. Any idea why it's happening. Your help is greatly appreciated.
i = recvfrom(s1,packetbuffer,sizeof(packetbuffer),0,(SOCKADDR *)&addr,&cbRemoteAddrSize);
Zxczc
-- modified at 5:16 Tuesday 15th November, 2005FD_SETSIZE];
fd_set fdSockSet;
int nNumSocks, nNumSocksCount;
char pBuf[] = "WinCE Echo Test Packet";
int iReceiveStatus;
//Change these if required
#define USERNAME "sudhagar" //TODO
#define PWD "nopass" //TODO
#define INV_TO "sandeep" //TODO
#define IP_SERVER "172.29.12.154"//TODO
#define PORT_SERVER "5070" //TODO
TIMEVAL ReceiveTimeout;
int iRC = 0;
int iSendStatus = 0;
int SIPlib_main()
{
int i=0,j=0,k,infop1;
char *reg_dest,*inv_dest,*bhr= NULL ,*nnop1;
int x=0,reg_id=-1;
char tmp[200],locip[50];
unsigned int addr2=0;
osip_proxy_authorization_t *proxy_auth;
int cbXfer, cbTotalRecvd, cbRemoteAddrSize;
TCHAR *str;
SOCKET s,s1;
struct sockaddr_in addr,addr1;
char packetbuffer[1200]={{'\0'}},packetbuffer1[1000]={{'\0'}};
WSADATA dat ;
///////////////
SOCKET SIPRTPSOC;
struct sockaddr_in addr21;
char nextnon1[50];
char *buf2;
buf2=(char*)malloc(8*sizeof(char));
///////////////
//End of variable declarations
if(WSAStartup(MAKEWORD(2,2), &wsaData))
{
// WSAStartup failed
return 1;
}
sock = INVALID_SOCKET;
for(i = 0; i < FD_SETSIZE; i++)
SockServ[i] = INVALID_SOCKET;
// Get a list of available addresses to serve on
memset(&Hints, 0, sizeof(Hints));
Hints.ai_family = nFamily;
Hints.ai_socktype = nSockType;
Hints.ai_flags = AI_NUMERICHOST | AI_PASSIVE;
if(getaddrinfo(NULL, szPort, &Hints, &AddrInfo))
{
OutputDebugString(TEXT("ERROR: Couldn't get resolve the server name/address!"));
}
nNumSocksCount = 0;
for(AI = AddrInfo; AI != NULL; AI = AI->ai_next)
{
if (nNumSocksCount == FD_SETSIZE)
{
// getaddrinfo returned more addresses than we could use
break;
}
if((AI->ai_family == PF_INET) || (AI->ai_family == PF_INET6)) // only want PF_INET or PF_INET6
{
SockServ[nNumSocksCount] = socket(AI->ai_family, AI->ai_socktype, AI->ai_protocol);
if (SockServ[nNumSocksCount] != INVALID_SOCKET)
{
if (bind(SockServ[nNumSocksCount], AI->ai_addr, AI->ai_addrlen) == SOCKET_ERROR)
closesocket(SockServ[nNumSocksCount]);
else
{
OutputDebugString(
TEXT("Socket 0x%08x ready for connection with %hs family, %hs type, on port %hs\r\n"),
SockServ[nNumSocksCount],
(AI->ai_family == AF_INET) ? "AF_INET" : ((AI->ai_family == AF_INET6) ? "AF_INET6" : "UNKNOWN"),
(AI->ai_socktype == SOCK_STREAM) ? "TCP" : ((AI->ai_socktype == SOCK_DGRAM) ? "UDP" : "UNKNOWN"),
szPort);
nNumSocksCount++;
}
}
}
}
freeaddrinfo(AddrInfo);
if (nNumSocksCount == 0)
{
OutputDebugString(TEXT("ERROR: Unable to serve on any address. Error = %d\r\n"), WSAGetLastError());
goto Cleanup;
}
//Initializing socket s for transmission
s = socket(PF_INET,SOCK_DGRAM,IPPROTO_UDP);
memset(&addr,0,sizeof(struct sockaddr_in));
addr.sin_family = PF_INET;
addr.sin_addr.s_addr = inet_addr(IP_SERVER);//Server IP
addr.sin_port = htons((short )atoi(PORT_SERVER));//(5 0 7 0); Server Listen Port
//1st Transmission ( REGISTER )
i=sendto(s,reg_dest,strlen(reg_dest),0,(struct sockaddr *)&addr,sizeof(struct sockaddr_in));
NKDbgPrintfW(L"\nSent : %d bytes\n\n",i);
if(i != strlen(reg_dest))
{
OutputDebugString(TEXT("ERROR: Couldn't send the data! error = %d\r\n"), WSAGetLastError());
}
// Wait for incomming data/connections
nNumSocks = nNumSocksCount;
FD_ZERO(&fdSockSet);
for (i = 0; i < nNumSocks; i++) // want to check all available sockets
FD_SET(SockServ[i], &fdSockSet);
if (select(nNumSocks, &fdSockSet, 0, 0, NULL) == SOCKET_ERROR)
{
OutputDebugString(TEXT("ERROR: select() failed with error = %d\r\n"), WSAGetLastError());
goto Cleanup;
}
for (i = 0; i < nNumSocks; i++) // check which socket is ready to process
{
if (FD_ISSET(SockServ[i], &fdSockSet)) // proceed for connected socket
{
FD_CLR(SockServ[i], &fdSockSet);
if(nSockType == SOCK_STREAM)
{
cbRemoteAddrSize = sizeof(ssRemoteAddr);
sock = accept(SockServ[i], (SOCKADDR*)&ssRemoteAddr, &cbRemoteAddrSize);
if(sock == INVALID_SOCKET)
{
OutputDebugString(TEXT("ERROR: accept() failed with error = %d\r\n"), WSAGetLastError());
goto Cleanup;
}
OutputDebugString(TEXT("Accepted TCP connection from socket 0x%08x\r\n"), sock);
}
else
{
sock = SockServ[i];
OutputDebugString(TEXT("UDP data available on socket 0x%08x\r\n"), sock);
}
break; // Only need one socket
}
}
// Receive data from a client
cbTotalRecvd = 0;
do
{
cbRemoteAddrSize = sizeof(ssRemoteAddr);
cbXfer = recvfrom(sock, packetbuffer + cbTotalRecvd, sizeof(packetbuffer) - cbTotalRecvd, 0,
(SOCKADDR *)&ssRemoteAddr, &cbRemoteAddrSize);
cbTotalRecvd += cbXfer;
} while(cbXfer > 0 && cbTotalRecvd < sizeof(packetbuffer));
OutputDebugString(TEXT("SUCCESS - Received %d bytes from client %hs\r\n"), cbTotalRecvd, szRemoteAddrString);
Cleanup:
for(i = 0; i < nNumSocks && SockServ[i] != INVALID_SOCKET; i++)
closesocket(SockServ[i]);
if(sock != INVALID_SOCKET)
{
shutdown(sock, SD_BOTH);
closesocket(sock);
}
WSACleanup();
return 0;
}
Zxczc
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I know that this combination now it's not possible.
The standard_sdk for WinCE.net 4.2 works only with evc 4.0 sp2 or higher (sp4).
The sdks available for VS2005 are only windows mobile 5.0 and pocketpc 2003.
Apparently there is no reason why I cannot compile a native application for wince 4.2 with vs2005 even if it seems that vs2005 only supports wince 5.0.
Anyone has faced the same problem ?
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Hello!
Is there an existing program that can handle login to remote computer automatically (i.e. with one click) with HP iPAQ? Remote terminal server always requires normal windows login after connecting to remote computer. What I'd like to have, is that to happen automatically just like windows remote desktop connection can be configured.
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Please tell me how to connect to Bluetooth. I want to connect with GPS receiver. thank you
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Using a pc I would use
GetBitmapBits
to get all the bits that make up an image, CE 4 however does not support this
I have tried a load of things to get the bitmap bits
the latest is this
//Get a handle to the screen DC
HDC hdcScreen = CreateDC(_T("DISPLAY"), NULL, NULL, NULL);
//CREATE A COMPATIBLE DC
HDC hdcCompatible = CreateCompatibleDC(hdcScreen);
// Create a compatible bitmap for hdcScreen.
HBITMAP hbmScreen = CreateCompatibleBitmAP(hdcScreen,lBitmap.bmWidth,lBitmap.bmHeight);
//PUT OBJECT IN TO THE DC TO BE POPULATED WITH INFO
SelectObject(hdcCompatible, hbmScreen);
//COPY INFO FROM SCREEN DC TO COMPATIBLE DC
BitBlt(hdcCompatible,0,0,lBitmap.bmWidth,lBitmap.bmHeight,hdcScreen,0,0,SRCCOPY);
So at this point i would expect the hbmScreen to be populated with all the current screen information, the next thing i need to do is see all that info in a bitmap i thought somthing like this might work but no
BITMAP* bitmap = (BITMAP*)hbmScreen;
I thought the above would allow me to get the bitmapbits as below
bitmap.bmBits
but I get bugger all back, this is begining to get on my tits, so if anyone knows any way of getting the raw data and can post up the example code or even show me where i am going wrong I would be oh so happy 
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hi guys
Just joined code project. I need your advice on some issues.
I am developing an application for pocket pc in which we need to send recieve sms/mms,billing etc
I am not finding a way to start.
Please any body can guide some cool links from where i can give a start.
 thanks a lot
hytechpro_gaurav
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Please can anyone help me in, how can I print from my application to an IrDA enable printer, or Just using the .Net Compact Framework to print to a printer through infrared.
TKAUB
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HP had a printing sdk and everything but it does not work with WM5 and they no longer suport it. You might find a copy some where. It works very well and it is a real letdown not having it for WM5.
tim
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I am recently writing a small utility for my new axim pda, using c#. In order to retrieve speed information from the CPU, i have to go down to assembly codes in C++. I am planning to write my own dll in C++ and then Pinvoke it in C# to do the job.
The problem is, VC C++ doesnt seem to reconize the assembly coes i wrote, it keeps giving me "error C2209: syntax error: "<l_type_ambig>" in the bolded line
inline unsigned _Read_CCNT(void) {
register unsigned _val_;
asm volatile("mrc\tp14,0,%0,c1,c0,0":"=r"(_val_));
return _val_;
}
I wonder if this is happening because I need a special assembler or something, thx for the info
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Hi all,
Maybe this forum is more adapted to my question... I want to create a form that will show as a dialog like a MessageBox, I know Windows Mobile permits it as I saw it in other apps, but how can I achieve this using .NET CF ?
Thanx,
Stephane
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Hi everyone!
I would need some message like WM_DEVICECHANGE as for desktops, that tells me that the hardware recently changed.
I would like to realize if someone plugged in an USB stick into the WinCE 5.0 device, but there seems to be no windows message equivalent to the one I mentioned above. So what else could I process to get the required information!?
I have looked through the MSDN and the net, but I could not find anything so far. Maybe my message is even sent by Windows but it's just not mentioned anywhere in the documentation... (Then I would still need some kind of hardcoded integer, since the compiler does not know anything called WM_DEVICECHANGE  )
Any suggestions would be gread, no matter which way has to be gone to reach the new hardware information!
Thanks a lot in advance,
Roland
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Have started learnig WinCE and programing
it through the evc++ version 4
Can u tell me were can i get some simple projects
to work on this operating system
thanking you
vikas
Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com
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Hi Roland,
I just encountered this very same question. So, if you find an answer I'd be happy to hear about possible solutions and vice versa.
regards: Hans
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Hey there,,,,,,,,,,
im working on cygnal microcontroller C8051F040 and am trying to interface it with a sonar.t program is ready as far as the interfacing is concerned. but while sending the necessary data over the CAN bus to other nodes, i have a slight problem i.e. i can't store data on flash. Can u help me fined some sites where they have sample programs on CAN & FLASH. is there any kind of a clash between FLASH initialisation & CAN ?? I have configured the CAN bus at 1MBPS.
sonar runs at 115200 baud. and both the uart's run at 115200 baud.
without the FLASH, the data is transferred successfuly to all the other nodes. but with FLASH, the program hangs(if CAN is started.) I also tried disabling CAN before FLASH. doesn't work.. Can nybody help me??
Waitin eagerly.... 
reeva
-- modified at 3:25 Thursday 3rd November, 2005
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I can drop a datagrid on my form in the IDE and nothing complains, but when I try to build it, it says it can't find a reference to the control. What's up with that?
All works fine on the PocketPC version of my app.
Thanks!
Carey Parks
(It isn't the danger that I worry about. It growing old and someday saying I wish I had done this thing or that.)
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Hi,
This is my first time posting here. I recently got a mobile device and it has made me want to make programs for it. I really enjoy messing and tinkering with it. The reason I want to make a program for it is cause, I think the O/S it has is very stripped down version? It doesn't even have the explorer.exe. So right now i'm using a file management for CE prog. It is running Windows CE 4.2 and I think it uses Compact Framework I see it in the "Remove Program" menu.
My goal is to make a Shortcut program for it when it starts up. Basically a program that just calls up other programs. My requirements are:
Uses the entire screen
No Menu bar or status bar (also no Minimize, restore, and close box at top right)
5 buttons
Uses Icons as buttons
when buttons are pressed it shows a pressed down state
My question is, I don't know almost anything about programming. I do know QBasic and thats it. Could someone please send me in the right direction like the right software required to make this program and reading articles, books, etc that could help me to acheive my goal.
Thank you for your time,
kim
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kim it will take time to create a Embedded Application FOR YOU (right now) as you dont have any concept. We (mostly) use .NET for developing embedded applications. i advice you to purchase a Beginner VB.NET Book and try to get some information from MS Compact Framework on the internet .. also there are alot of articles available on Internet for beginners to learn VB.NET and compact framework.
the second option for you is to learn about Embedded Visual Basic.
Regards
Rizwan Ahmed Malik
R A M
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Hey Ram,
Thanks for the reply, Atleast I kinda know where to start now. I'll go check out some books at my local bookstore. I talked to someone else and they reffered me to Embedded Visual C++. Can you let me know which program would suite my situation?
Thanks again
Regards,
Kim
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