.NET Framework Solutions: In Search of the Lost Win32 API by John Paul Mueller

By John Paul Mueller

While you are doing .NET -> local interop., this e-book may still lovely have just about all that you just desire. notice that it doesn't conceal COM (RCW) interop in that a lot aspect and doesn't speak about CCW (COM -> .NET). in spite of the fact that, the assurance of MarshalAs() and the smart examples that convey tips to take care of the complicated DirectX constructions are on my own definitely worth the cost of admission.
What I cherished most sensible used to be the writer did not take the cop out answer (managed C++) except it used to be totally precious. lots of the code examples within the ebook are in C# and this could be of a few situation to the VB.NET programmers. The chapters are good equipped and there is an appendix with 50+ strong tips about PInvoke. while you're nonetheless being affected by your PInvoke interop challenge after interpreting this e-book, it is time to deliver out the heavy weight (Adam Nathan's bible) -- solid luck!!!

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Creating a structure with a UInt16 where you need a UInt32 will still result in failure. Generally, you’ll want to create the structures where they fit best. For example, if you need to create a structure for a function in a wrapper DLL, then place the structure in the wrapper DLL, not with the application accessing the function. There are exceptions to every rule, however. You might need to create a special version of a structure for some Windows API function calls when working in Visual Basic.

This technique helps you determine the true source of a help request, making context−sensitive help easier to provide. The main focus of this section is the use of the [MarshalAs] attribute in the MessageBoxEx() declaration. Notice that we need to use this attribute for both string inputs. You might see some odd output without the attribute (or the call might simply fail). As previously mentioned, you need to use an IntPtr for handles. The Type variable can include a number of inputs as shown in the btnTest_Click() method.

1 shows all of the potential inputs for MessageBoxEx(). However, not all of the inputs are available in every version of Windows. In fact, many of the unique features are only available in Windows 2000 and Windows XP. Make sure you check the Platform SDK documentation for potential problems when using these features in other versions of Windows. The example was tested under both Windows 2000 and Windows XP—it doesn’t work under most versions of Windows 9x. NET Framework version. This function also enables // you to add special buttons and other features to the message box.

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