Regular, fully documented Win32 APIs are used. The other parts of the program (the bulls eye cursor and the special Mouse movements ( WM_LBUTTONUP, ReleaseCapture). When the user lifts up the left-mouse button, stop monitoring.Highlight the window ( GetWindowRect, GetWindowDC,.Get the HWND of the window beneath the mouse ( WindowFromPoint).Whenever the mouse moves, get the screen position of the mouse ( GetCursorPos).Monitor all mouse movement by handling WM_MOUSEMOVE.The general principles can be summed up in the following pseudocode : The principles of window finding and highlighting via mouse tracking are explained The demo app will not perform any action on any selected window.The screen position, rectangularĭimensions and the Window Class Name of the selected window will alsoīe displayed on the Search Window dialog box. The window underneath the mouse will be highlighted by having its borders From here on, move the bulls eye across any window on the screen and.The main frame window of the demo app will also be hidden.The mouse cursor will "disappear" and be changed into the bulls eye icon.ĭrag the mouse and the bulls eye will follow. Press and hold down the left-mouse button on the bulls eye icon.Move the mouse cursor inside the Finder Tool icon (the bulls eye).My version of the Window Finder Utility works exactly the same way as the one in Microsoft Spy++.Run the demo application and select the "Search|Find Window" menu item.After learning the principles, readers canĮasily incorporate the source codes into MFC. My intension is toĭemonstrate the raw principles. I have developed my sample using Win32 and avoided MFC. The Window Search dialog box willīe the focal point of our discussion and the main frame window serves only as aĬontainer of the dialog box.
Highlighting and selection via mouse tracking. The demo application and its source code aims to demonstrate window
Newbies who may be wondering just how such a window selecting utility is I'd like to share my code with readers out there, especially the Window Searching Facility, I tried my hand at re-creating a similar WindowĪfter a few days of coding and testing, I came up with one imitation (seeĭiagram above). Windows messages targeted at that window as well as providing variousĪfter studying carefully some Win32 APIs and closely watching this Spy++ To highlight and select windows on the desktop. "dragged out" (with the mouse magically turning into the "bulls This utility (symbolized by the "bulls eye" icon) can seemingly be That cool Window Finder Tool inside Spy++ (see diagram below) ? Have you ever wondered how the Microsoft Engineers developed
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