If you are going to call Marshal.GetLastWin32Error, the function whose error you're retrieving had better have SetLastError=true - The Old New Thing However GetLastWin32Error with the attribute clearly is best.įor more info, see e.g. Using GetLastError (which often gives the right error code) is better than using GetLastWin32Error on a Win32 that was declared without the attribute (as that always returns wrong error codes).
Since you didn't use the attribute, the error code returned does not belong to your Win32 call. The DllImport attribute SetLastError=true. The latter returns the error code from the most recent Win32 call that had when another thread intervenes and somehow calls Win32). The former returns the latest Win32 error, but that might be associated to something other than your explicit Win32 p/invoke operation (e.g. Here is a slightly modified LOCKWS.CPP from the "Locking a window station" example which emulates C-A-D if you run LOCK.There are two functions that provide error information: GetLastError and GetLastWin32Error. I just want this to be an EXE to be executed without any interface (If possible). I have assigned 500 points however if someone is willing to walk me through the coding process (Since I am only using C this one time) I will create another points question for the individual that answers the question. Any assistance would be greatly appreciated. I am trying to implement the following code using the MSFT Visual C++ 2005 Express app that is avialable online and I just don't know enough about C to begin to understand how everything works, or how to actually utilize the code that is provided. I really have had very little exposure to VC++ or any C lang to be honest. I am a VB coder, and I taugh myself that.
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