SAMPLE: Code Demonstrates Superclassing MDI Client Window

• Microsoft Windows Software Development Kit (SDK) for Windows versions 3.0 and 3.1

SUMMARY

An application can use superclassing to add new styles and functionality to a multiple document interface (MDI) client window. SUPERMDI is a file in the Microsoft Software Library that demonstrates superclassing an MDI client window to change its behavior.

Download SUPERMDI.EXE, a self-extracting file, from the Microsoft Software Library (MSL) on the following services:

• Microsoft Download Service (MSDL)

        Dial (206) 936-6735 to connect to MSDL
        Download SUPERMDI.EXE (size: 26853 bytes) 
  

• Internet (anonymous FTP)

        ftp ftp.microsoft.com
        Change to the \SOFTLIB\MSLFILES directory
        Get SUPERMDI.EXE (size: 26853 bytes) 
  

MORE INFORMATION

Under a variety of circumstances an application might be designed to change the predefined behavior of an MDI client window. Superclassing provides the easiest and cleanest method to change window styles or to handle messages in a unique manner.

By default, an MDI client window cannot accept mouse button double-clicks. If an application superclasses the client window, the application can change the window style of the client window and have it accept double- clicks. An application can also use this method to change the MDI client window background color.

The SUPERMDI sample application demonstrates changing the color of the MDI client window and enabling the MDI client to respond to mouse button double- clicks.