These are some of the available Windows functions The application, but it still won't restart. I have tried using both Process Explorer and Alt-ctrl-del to terminate Unfortunately, clicking Stop! crashes the applicationĪnd it will not restart until you reboot the system.
You will be able to see all the windows messages sent to the selected window. If you select Messages / Selected windows Warning - selecting the following option crashed the application and required a full reboot to The IsWindow function determines whether a window handle identifies a valid, existing window.ĭelphi 5 ships with a tool - WinSight - that will show you all the current windows,ĭouble click an entry for additional information. To limit the search to the child windows of a particular application, use the FindWindowEx function. If such a window exists, FindWindow returns the handle of the window. Specifically, it includes data types, constants, and function calls.įrom the Windows SDK help ( Window Handles)Ī window handle has the HWND data type an application must use this type when declaring a variable that holds a window handle.Īn application can use the FindWindow function to discover whether a window with the specified class name or window name exists in the system. Note that windows.pas contains data from many c++ header filesĪnd is used to define the Windows API as described in the Windows SDK. In Delphi (a case insensitive language), defined types begin Lower case and all the Microsoft defined types are uppercase. in a 32-bit operating system.Ĭ++ is a case sensitive language. Which amounts to approximately the same thing. Where a LongWord is an unsigned 32-bit value. PHandle = ^THandle // but they are really from winnt.h THandle = LongWord // The comments say these are from WINDEF.H These include application windows and the controls (buttons, menus, and so forth) Windows uses handles to identify many objects.
To do that, I needed a way to obtain the handle of the application window. I wanted to write the window image directly to a jpeg or png file. I wanted to develop my own print screen function -īut instead of capturing the image to the clipboard, Delphi - Getting Window Handles Delphi - Getting Window Handles
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