1/2/2023 0 Comments Flash a windowThe market is a bit confusing because it is still very much oriented to the commercial world. There is a wide selection of “fluid-applied” or “liquid” membranes designed as alternatives to building wraps and flexible flashing products. And even if you have someone on the crew with the talent and patience to do a good job, it’s painstaking and time-consuming, making fluid-applied flashing cost-effective for complex flashing jobs. I’ve gravitated to using fluid-applied flashing mainly for window and door flashing, and particularly for recessed windows and for “outie” windows on houses with thick exterior insulation-applications that are extremely challenging to do with flexible membrane flashings for even the most experienced craftsman. ![]() But I feel like it’s just been in the last two years or so that they have started to gain traction in the residential world. But when I heard of it being used as a replacement for the origami-type work normally required to flash a recessed window, the light switched on for me.įluid-applied weather barriers and flashing membranes have been around for more than 10 years, mainly in the commercial building world. I figured that a painted-on version of housewrap would never be as good as the “real” thing. You could then call this method with this code: Self.The first time I saw a “liquid housewrap” being installed, I was skeptical. To do this, create a global method on a module with this code: Public Sub Flash(Extends w As Window)ĭeclare Function FlashWindow Lib "User32" (handle As Integer, invert As Boolean) As Boolean If you wanted to make this more easily accessible you could use the Extends method feature to make this available for any window. Since the return value is not needed, the Call statement is used to avoid having to declare a variable to store the result. You can call this function by passing in a window handle, so if you had the above Declare on a button’s Action event handler you could flash the window with this code: Call FlashWindow(MyWindow.Handle, True) With this this information you can create the Declare statement to this function, which looks like this: Declare Function FlashWindow Lib "User32" (handle As Integer, invert As Boolean) As Boolean At the bottom of the doc page there is a section that tells you the library that contains this function, which is “User32.lib”. ![]() ![]() The HWND parameter is the handle to the window, which you get from Xojo as Window.Handle (it is an Integer). ![]() This tells you that this method is a function (the BOOL at the beginning indicates it returns a Boolean) and that it takes two parameters. It looks like this: BOOL WINAPI FlashWindow( Refer to the FlashWindow doc page in the Microsoft Win32 docs, where you can see the declaration for this method. The Win32 API is largely based on the C/C++ programming language and makes heavy use of structures.Īs a simple example, you can call a simple function to flash the window to get the user’s attention. To create a Declare statement you first need to track down the API you want to use using Microsoft’s documentation: Microsoft Developer Documentation. You can call into Win32 APIs (aka WinAPI) to use methods and properties that are not built into the framework by using the Declare command.
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