CreateFile fails - 120 error code

[Antoine]

Hello,

I'm writing a program to send requests to my wlan pocket pc device (UIO1:
driver) in C#.

Here how I import CreateFile functions from coredll.dll with DllImport:
[DllImport("core dll.dll", SetLastError=tr ue, CharSet=CharSet .Auto)]
public static extern IntPtr CreateFile(
string lpFileName,
uint dwDesiredAccess ,
uint dwShareMode,
IntPtr lpSecurityAttri butes,
uint dwCreationDispo sition,
uint dwFlagsAndAttri butes,
IntPtr hTemplateFile
);
[DllImport("core dll.dll", EntryPoint="Cre ateFileW", SetLastError = true,
CharSet=CharSet .Auto)]
private static extern IntPtr CreateFileW(
string lpFileName,
uint dwDesiredAccess ,
uint dwShareMode,
IntPtr lpSecurityAttri butes,
uint dwCreationDispo sition,
uint dwFlagsAndAttri butes,
IntPtr hTemplateFile
);

Then, I try to open the device with this code:
hMSD = CreateFileW( "UIO1:", GENERIC_READ|GE NERIC_WRITE, 0,
System.IntPtr.Z ero, OPEN_EXISTING, 0, System.IntPtr.Z ero);
if( hMSD == new IntPtr(-1) || Marshal.GetLast Win32Error()>0)
{
System.Windows. Forms.MessageBo x.Show( "ERROR
n"+Marshal.GetL astWin32Error() , "ERROR !",
System.Windows. Forms.MessageBo xButtons.OK,
System.Windows. Forms.MessageBo xIcon.Exclamati on,
System.Windows. Forms.MessageBo xDefaultButton. Button1);
throw(new ApplicationExce ption( "ERROR
["+Marshal.GetLa stWin32Error()+ "]: opening port."));
}

I tried to open device with CreateFile() and CECreateFileW() functions, but
none really succeeded.
* CreateFile() fails and GetLastWin32Err or() returns 87 error code
(ERROR_INVALID_ PARAMETER).
* CreateFileW() succeed with integrated POCKET PC 2003 EMULATOR but fails on
my Pocket PC 2003 (Windows CE 4.2) where GetLastWin32Err or() returns 120
error code (ERROR_CALL_NOT _IMPLEMENTED).

Then, I tried to play with CharSet DllImport attribute, but with no success.

The same program wrote in C++ runs...

My english is poor, so I hope you understood my problem.
Thank you for you help.
Antoine.

[Ignacio Machin \( .NET/ C# MVP \)]

Hi Antoine,

Try changing the parameters of type string to type StringBuilder.

Cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

"Antoine" <an***********@ free.fr> wrote in message
news:40******** *************** @news.free.fr.. .

Hello,

I'm writing a program to send requests to my wlan pocket pc device (UIO1:
driver) in C#.

Here how I import CreateFile functions from coredll.dll with DllImport:
[DllImport("core dll.dll", SetLastError=tr ue, CharSet=CharSet .Auto)]
public static extern IntPtr CreateFile(
string lpFileName,
uint dwDesiredAccess ,
uint dwShareMode,
IntPtr lpSecurityAttri butes,
uint dwCreationDispo sition,
uint dwFlagsAndAttri butes,
IntPtr hTemplateFile
);
[DllImport("core dll.dll", EntryPoint="Cre ateFileW", SetLastError = true,
CharSet=CharSet .Auto)]
private static extern IntPtr CreateFileW(
string lpFileName,
uint dwDesiredAccess ,
uint dwShareMode,
IntPtr lpSecurityAttri butes,
uint dwCreationDispo sition,
uint dwFlagsAndAttri butes,
IntPtr hTemplateFile
);

Then, I try to open the device with this code:
hMSD = CreateFileW( "UIO1:", GENERIC_READ|GE NERIC_WRITE, 0,
System.IntPtr.Z ero, OPEN_EXISTING, 0, System.IntPtr.Z ero);
if( hMSD == new IntPtr(-1) || Marshal.GetLast Win32Error()>0)
{
System.Windows. Forms.MessageBo x.Show( "ERROR
n"+Marshal.GetL astWin32Error() , "ERROR !",
System.Windows. Forms.MessageBo xButtons.OK,
System.Windows. Forms.MessageBo xIcon.Exclamati on,
System.Windows. Forms.MessageBo xDefaultButton. Button1);
throw(new ApplicationExce ption( "ERROR
["+Marshal.GetLa stWin32Error()+ "]: opening port."));
}

I tried to open device with CreateFile() and CECreateFileW() functions, but none really succeeded.
* CreateFile() fails and GetLastWin32Err or() returns 87 error code
(ERROR_INVALID_ PARAMETER).
* CreateFileW() succeed with integrated POCKET PC 2003 EMULATOR but fails on my Pocket PC 2003 (Windows CE 4.2) where GetLastWin32Err or() returns 120
error code (ERROR_CALL_NOT _IMPLEMENTED).

Then, I tried to play with CharSet DllImport attribute, but with no success.
The same program wrote in C++ runs...

My english is poor, so I hope you understood my problem.
Thank you for you help.
Antoine.

[Antoine]

I tried to change the parameters of type string to type StringBuilder, but
this does nothing.

I wonder what makes the difference between the emulator and my pocket PC,
and why this code only succeed with the emulator and with CreateFileW()
function (whereas CreateFileA() does not exist in coredll.dll and
CreateFile() seems to be an alias of CreateFileW()) ??

This is very strange!

Thanks.

Antoine.

"Ignacio Machin ( .NET/ C# MVP )" <ignacio.mach in AT dot.state.fl.us > a
écrit dans le message de news:ug******** ******@TK2MSFTN GP10.phx.gbl...

Hi Antoine,

Try changing the parameters of type string to type StringBuilder.

Cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

"Antoine" <an***********@ free.fr> wrote in message
news:40******** *************** @news.free.fr.. .

Hello,

I'm writing a program to send requests to my wlan pocket pc device (UIO1: driver) in C#.

Here how I import CreateFile functions from coredll.dll with DllImport:
[DllImport("core dll.dll", SetLastError=tr ue, CharSet=CharSet .Auto)]
public static extern IntPtr CreateFile(
string lpFileName,
uint dwDesiredAccess ,
uint dwShareMode,
IntPtr lpSecurityAttri butes,
uint dwCreationDispo sition,
uint dwFlagsAndAttri butes,
IntPtr hTemplateFile
);
[DllImport("core dll.dll", EntryPoint="Cre ateFileW", SetLastError = true,
CharSet=CharSet .Auto)]
private static extern IntPtr CreateFileW(
string lpFileName,
uint dwDesiredAccess ,
uint dwShareMode,
IntPtr lpSecurityAttri butes,
uint dwCreationDispo sition,
uint dwFlagsAndAttri butes,
IntPtr hTemplateFile
);

Then, I try to open the device with this code:
hMSD = CreateFileW( "UIO1:", GENERIC_READ|GE NERIC_WRITE, 0,
System.IntPtr.Z ero, OPEN_EXISTING, 0, System.IntPtr.Z ero);
if( hMSD == new IntPtr(-1) || Marshal.GetLast Win32Error()>0)
{
System.Windows. Forms.MessageBo x.Show( "ERROR
n"+Marshal.GetL astWin32Error() , "ERROR !",
System.Windows. Forms.MessageBo xButtons.OK,
System.Windows. Forms.MessageBo xIcon.Exclamati on,
System.Windows. Forms.MessageBo xDefaultButton. Button1);
throw(new ApplicationExce ption( "ERROR
["+Marshal.GetLa stWin32Error()+ "]: opening port."));
}

I tried to open device with CreateFile() and CECreateFileW() functions, but

none really succeeded.
* CreateFile() fails and GetLastWin32Err or() returns 87 error code
(ERROR_INVALID_ PARAMETER).
* CreateFileW() succeed with integrated POCKET PC 2003 EMULATOR but

fails on

my Pocket PC 2003 (Windows CE 4.2) where GetLastWin32Err or() returns 120
error code (ERROR_CALL_NOT _IMPLEMENTED).

Then, I tried to play with CharSet DllImport attribute, but with no

success.

The same program wrote in C++ runs...

My english is poor, so I hope you understood my problem.
Thank you for you help.
Antoine.

[Antoine]

The most strange is that error 120 means the function is not supported on
the system (ERROR_CALL_NOT _IMPLEMENTED), but the same program written in C++
doesn't return any error.
"Antoine" <an************ @iaai.fr> a écrit dans le message de
news:40******** *************** @news.free.fr.. .

I tried to change the parameters of type string to type StringBuilder, but
this does nothing.

I wonder what makes the difference between the emulator and my pocket PC,
and why this code only succeed with the emulator and with CreateFileW()
function (whereas CreateFileA() does not exist in coredll.dll and
CreateFile() seems to be an alias of CreateFileW()) ??

This is very strange!

Thanks.

Antoine.

"Ignacio Machin ( .NET/ C# MVP )" <ignacio.mach in AT dot.state.fl.us > a
écrit dans le message de news:ug******** ******@TK2MSFTN GP10.phx.gbl...

Hi Antoine,

Try changing the parameters of type string to type StringBuilder.

Cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

"Antoine" <an***********@ free.fr> wrote in message
news:40******** *************** @news.free.fr.. .

Hello,

I'm writing a program to send requests to my wlan pocket pc device (UIO1: driver) in C#.

Here how I import CreateFile functions from coredll.dll with DllImport: [DllImport("core dll.dll", SetLastError=tr ue, CharSet=CharSet .Auto)]
public static extern IntPtr CreateFile(
string lpFileName,
uint dwDesiredAccess ,
uint dwShareMode,
IntPtr lpSecurityAttri butes,
uint dwCreationDispo sition,
uint dwFlagsAndAttri butes,
IntPtr hTemplateFile
);
[DllImport("core dll.dll", EntryPoint="Cre ateFileW", SetLastError = true, CharSet=CharSet .Auto)]
private static extern IntPtr CreateFileW(
string lpFileName,
uint dwDesiredAccess ,
uint dwShareMode,
IntPtr lpSecurityAttri butes,
uint dwCreationDispo sition,
uint dwFlagsAndAttri butes,
IntPtr hTemplateFile
);

Then, I try to open the device with this code:
hMSD = CreateFileW( "UIO1:", GENERIC_READ|GE NERIC_WRITE, 0,
System.IntPtr.Z ero, OPEN_EXISTING, 0, System.IntPtr.Z ero);
if( hMSD == new IntPtr(-1) || Marshal.GetLast Win32Error()>0)
{
System.Windows. Forms.MessageBo x.Show( "ERROR
n"+Marshal.GetL astWin32Error() , "ERROR !",
System.Windows. Forms.MessageBo xButtons.OK,
System.Windows. Forms.MessageBo xIcon.Exclamati on,
System.Windows. Forms.MessageBo xDefaultButton. Button1);
throw(new ApplicationExce ption( "ERROR
["+Marshal.GetLa stWin32Error()+ "]: opening port."));
}

I tried to open device with CreateFile() and CECreateFileW() functions,

but

none really succeeded.
* CreateFile() fails and GetLastWin32Err or() returns 87 error code
(ERROR_INVALID_ PARAMETER).
* CreateFileW() succeed with integrated POCKET PC 2003 EMULATOR but

fails

on

my Pocket PC 2003 (Windows CE 4.2) where GetLastWin32Err or() returns

120 error code (ERROR_CALL_NOT _IMPLEMENTED).

Then, I tried to play with CharSet DllImport attribute, but with no

success.

The same program wrote in C++ runs...

My english is poor, so I hope you understood my problem.
Thank you for you help.
Antoine.