P/Invoke Interop Assistant uint type cast question

[Tim Sprout]

The P/Invoke Interop Assistant (http://www.codeplex.com/clrinterop)
generates a signature for GetDefaultPrinter using an uint type for
pcchBuffer:

public static extern bool GetDefaultPrinter([OutAttribute()]
[MarshalAsAttribute(UnmanagedType.LPStr)] StringBuilder pszBuffer, ref
uint pcchBuffer);

However, StringBuilder only accepts type int. Is it safe to cast uint to
int?

The GetDefaultPrinter signature on pinvoke.net uses an int type for
pcchBuffer, so a cast is not necessary.

Thanks,

Tim Sprout

[Mark Salsbery [MVP]]

"Tim Sprout" <tm**@ptialaska.netwrote in message
news:ut**************@TK2MSFTNGP04.phx.gbl...

The P/Invoke Interop Assistant (http://www.codeplex.com/clrinterop)
generates a signature for GetDefaultPrinter using an uint type for
pcchBuffer:

public static extern bool GetDefaultPrinter([OutAttribute()]
[MarshalAsAttribute(UnmanagedType.LPStr)] StringBuilder pszBuffer, ref
uint pcchBuffer);

However, StringBuilder only accepts type int. Is it safe to cast uint to
int?

The GetDefaultPrinter signature on pinvoke.net uses an int type for
pcchBuffer, so a cast is not necessary.

It doesn't make a difference since an int and a uint are the same size.

Technically, ref uint is the correct type for the GetDefaultPrinter() call,
but if it's easier to use an int then go for it :)

I personally prefer to use the type that will need the least amount of
casting.

Mark

--
Mark Salsbery
Microsoft MVP - Visual C++

>
Thanks,

Tim Sprout

[Tim Sprout]

Mark Salsbery [MVP] wrote:

"Tim Sprout" <tm**@ptialaska.netwrote in message
news:ut**************@TK2MSFTNGP04.phx.gbl...

>The P/Invoke Interop Assistant (http://www.codeplex.com/clrinterop)
generates a signature for GetDefaultPrinter using an uint type for
pcchBuffer:

public static extern bool GetDefaultPrinter([OutAttribute()]
[MarshalAsAttribute(UnmanagedType.LPStr)] StringBuilder pszBuffer, ref
uint pcchBuffer);

However, StringBuilder only accepts type int. Is it safe to cast uint
to int?

The GetDefaultPrinter signature on pinvoke.net uses an int type for
pcchBuffer, so a cast is not necessary.

It doesn't make a difference since an int and a uint are the same size.

Technically, ref uint is the correct type for the GetDefaultPrinter()
call, but if it's easier to use an int then go for it :)

I personally prefer to use the type that will need the least amount of
casting.

Mark

Thanks, Mark!

Tim Sprout