Unable to load DLL 'sqlceme35.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

Question

I'm new to ADO.NET and need help with this error.
Currently running Vista Home Premium 64 and Visual Studio 2008 Trial.
1. Create Win form app.
2. Add new data source...
3. New connection - SQL Server Compact 3.5 - Northwind.sdf
4. Highlight Products and Suppliers.
5. Drag both onto Win form
6. Run with debug
7. Error message "Unable to load DLL 'sqlceme35.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)"
some blogs advice change dir in SQL Server Compact 3.5 in regedit but regedit doesn't even have SQL Server Compact 3.5; only SQL Server\SQLExpress.
reinstall SQL Server Compact 3.5 and problem still exists.
anyone knows how to fix this problem?

Answer 1

 ErikEJ wrote:
Have you set your solution target to "Any CPU" ?? If so, set to "x86", as SQL Compact only runs in WoW mode on x64. Or use corflags.exe /32BIT+ against your project output (.exe file).
 ErikEJ wrote:
Look at this blog post for a walk-through: http://erikej.blogspot.com/2008/01/x64-and-sql-compact.html
Hello everyone,
I have the same problem as mentioned above "Unable to load DLL 'elev.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E) ", when trying to load the dll file into a window application.  I developed a window application in VS2005 and want to import a dll file from another program into my project and use it.  But when I try to call one of the function in the dll file, I got the error message "Unable to load dll 'elev.dll".  I try all options that say it works to solve this problem, but somehow it doesn't work for me. I put the "elev.dll" file in the bin folder and use P/Invoke to import the dll file into my project.  Can anyone help me out with this?  thanks and really appreciated!
 Here is how I import the dll:
[DllImport(@"D:\elev.dll")]
//[DllImport("emap.dll", SetLastError = true)]
private static extern void EMA_Init();
and in the code,  I call the function above but failed to load the dll file
EMA_Init();