C Message handling functions

DefWindowProc and WindowProc are both ** processing message API functions, and DefWindowProc handles messages that are not processed by WindowProc. However, in the scenario of your program, cmfcwnd is a subclass of cframewnd, and only calling defwindowproc cannot achieve all the cframewnd characteristic messages, and you must call the message handler of the parent class.

You can set global variables, save window handles, and send messages to different windows by calling unified global variables, access window handles, or use hwnd broadcast to send messages to other processes, or windows of dll files, etc., see .

First of all, you need to know who to send to, you can use the findwindow function, and the window you know can also be a member of the cwnd.

After that, the message is sent using the sendmessage function. For example, MS DataCopy

You don't need to write GetMessage. Message loops will do. All you need to do is write the corresponding message function.

In the process of receiving and processing messages, try not to delay, and other places can

Function calls are made directly, and the operating system does not gain control.

Messaging, on the other hand, goes to the operating system, that is, the operating system takes control, and then goes through the message loop mechanism and then goes to message processing.

Take a look at Windows programming, this one or two sentences can't be explained.

That is, you will define an ID for each menu in the resource file, and you can use this ID to connect the resource file to the message.

The following **csdn

The Update Command UI is the update command UI message, which is designed to handle the update of menu items and toolbar buttons.

Select the menu button you want - > right-click, Class Wizard - > command, add response function, function.

Point class wizard to generate a response function.

1.You have to see if there are manually added handlers and message mappings in your ** file, whether they are deleted when they are deleted, and if not, manually deleted.

2.You delete it next. ncb file to try.

Leave QQ and give you remotely.

Okay, eight o'clock in the evening.

Can't add == birthday.

Write it yourself, overload the message response function, and add the corresponding message mapping.

If you know it well, you can delete it manually. But it's better to use the class wizard to delete it.

1.In the class view, right-click the class to which you want to add a handler and select Properties.

2.In the Properties window, click the Message button.

3.In the Message list box, select the message that you want to add.