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    <p>To understand how Win32 application works requires additional effort compared to usual console application. </p> <p>"I had this crazy image, that win32 programming is based on calling windows functions and sending parameters to and from them"</p> <p>my hints ...</p> <p>1 )True , but also windows message that are the beats of a Windows Application , some example include WM_CREATE, WM_MOUSExx , WM_KEYxx , WM_PAINT where xx can be DOWN UP and so on . Messages are sent to your application by Windows itself , it is up to you to define a specific function to trap them (the "WindowFunc"). There are hundreds of messages, luckily is not necessary to understand all them at first .</p> <p>2) Every widget you can imagine to create in your app is a "Window" , and you can create Windows by CreateWindow function .Each window will be identified by a 32 bit integer value the so called Window Handle (HWND)</p> <p>3 There are so many different class of windows as you can imagine (mainwindow , clientarea , edit, button) both available from the system and also created by yourself... Windows are different as they belong from different WindowClass ... </p> <p>To define a WindowClass you have to fill a WNDCLASS c structure and call RegisterClass A field in the struct is a pointer to the WindowFunc </p> <p>4 The WindowFunc is a function that takes 4 input parameters (HWND,WM_XX,wParam,lParam) That function will be called from the system as soon as something happens regarding that window (HWND)</p> <p>said that let me rewrite your statement</p> <p>"Like, when you want to create window, you call some win32 function that handles windows GUI and say "Hi, please, create me new window, 100 x 100 px, with two buttons", and that GUI function says "Hi, no problem, when something happends, like user clicks one button, ...I will send you a message to the windowFunc as the user click... please check for the messagetype by yourself and if it is the WM_MOUSEDOWN you was waiting for then change the value for xy </p> <p>What else ? i suggest to look at some simple sample in the sdk to get confident on how a win 32 app flow is </p> <p>cheers</p>
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