Sometimes people come on IRC and ask “How do I make a window? learn them later so here is the code to a simple window which will be explained shortly. The book to get on Win32 API. If you want to write programs using just the API . Why you should learn the API before MFC. The Controversy. Too many people.

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The units are pixels, which is the smallest unit a screen can display at a given resolution. Approximately because like I said, SetTimer is a little inaccurate, but this isn’t critical code, and a few milliseconds here or there won’t kill us.

And one more for the MDI Child. Set it to 0 if wib32 like to see the difference. We’ll be doing wij32 of this with the common controls in the next couple of sections so you’ll get more practice eventually. A menu that is assigned to a window is automatically removed when the program terminates, so we don’t need to worry about getting rid of it later.

If your compiler supports both feel free to pick which one you use. In this case we want to be able to interact with both out dialog and our main window, and this will be the focus of the next section. This is very handy if you only want positive integers, otherwise it’s not much good, since you can’t enter any other characters, including – minus. Using files and the common dialogs 3.

Registering the Window Class A Window Class stores information about a type of window, including it’s Window Procedure which controls the window, the small and large icons for the window, and the background color. Well it’s not entirely that simple I’m afraid.

MFC Resource file notes.

Adding Items The first thing you’ll want to do with a listbox is add items to it. In this example we’ll only be creating one child type, which will be just like the editor program in the previous examples.

This information should be purely academic, as you almost always use a resource editor to create dialogs, but knowing how to do it from text is sometimes necessary, expecially if you have no visual editor. Button, Edit, List Box Example: So when you finally do need to use them you need to add it yourself, you can’t rely on the framework to do it for you and if you don’t understand the API this could be quite the chore.


Well worthwhile for anyone writing GUI apps in windows. Another effect of using DialogBox is that your main window is disabled untill the dialog is dismissed. As you can see we added another case into our switch.

Since this is such a common task, there are predefined system dialogs that you can use to allow the user to select a file name. If you can’t figure out how to use them, you probably need to re-read some parts of this tutorial, or get a book which will explain things more thouroughly. We can’t use LoadIcon at all because it will only load resources, not files. An HDC is basically a handle to something you can draw on; it can represent the entire screen, an entire window, the client area of a window, a bitmap stored in memory, or a printer.

This perticular file isn’t actually required, so to fix the error you can edit the.

Windows API tutorial

We do the same thing with the second filter except that this is a generic filter for all files. Using the pragma will allow you to compile programs nearly as simply as above, but you still need to forhers the. I don’t include all the code in the text itself, only that which is relevant to whatever I’m currently discussing.

This information is courtesy of Shaun Ivory, a software engineer for MS and a friend of mine from winprog. The creation data which I almost never use that can be used to send additional data to the window that is being created is also NULL. The 3rd parameter is the length of the string, but we’ve passed -1 because DrawText is smart enough that it will figure out how long the text is itself.

A control is just a window after all.

Read the whole thing! Windows Notepad is little more than a plain old window with a big edit control inside it. The messages you send are widely varied between each control, and each control has wim32 own set of messages. Like any other window they have a window procedure, a window class etc Windows sends a variety of messages related to colours to your dialog procedure, and by handling these messages you can change what colour certain things are displayed in.


Well it’s not entirely that forgfrs I’m afraid. And here’s the second one: As well as those who have simply written to say they’ve found the tutorial useful. If I or someone else refers to handling a message they mean to add it into the WndProc of your window class as follows: This is a simple matter to correct One, just like always, for your main window the Frame. You can also use icons that aren’t stored as resources, you could choose to store your icon as a seperate file and load it at runtime.

We’ll also prompt the user if they select an existing file to make sure they want to overwrite it. Do stuff with indexes GlobalFree buf ; In this example, buf[0] is the first index, and so on up to buf[count – 1]. Sometimes a window can be all client area, and nothing else, sometimes the client area is smaller to make room for menus, titles, scrollbars, etc I use it regularly.

The names and values here are up to you for the choosing. You can choose to ignore the warnings, or just use 0 instead. This no longer applies. The parameters are as follows: This is of course better for me as I don’t have to type as much and it’s better for you because you will be able to add the code into ANY program and not just the ones I present.

The instance handle is set to the value that is passed in as the first parameter to WinMain. Any drawing operation we perform on this HDC will immediately display on the screen. One thing to remember is that dialogs are just windows.