- 1 year ago
How to use ExtractAssociatedIcon in dartlang win32 package
To use the ExtractAssociatedIcon
function in the win32
package in Dart, you can follow these steps:
Import the necessary libraries. You need to import the
win32
anddart:ffi
libraries:javascriptimport 'package:win32/win32.dart';
import 'dart:ffi' as ffi;
Define the necessary types. You need to define the
HICON
andLPCTSTR
types:arduinotypedef HICON = ffi.Pointer<ffi.Void>;
typedef LPCTSTR = ffi.Pointer<Utf16>;
Call the
ExtractAssociatedIcon
function. You can call theExtractAssociatedIcon
function to extract the icon associated with a file:scssfinal path = TEXT('path\\to\\file.txt');
final icon = ExtractAssociatedIconW(GetModuleHandle(nullptr), path, ffi.allocate<Uint32>());
This code extracts the icon associated with the file
path\to\file.txt
and stores it in theicon
variable. TheGetModuleHandle
function retrieves the handle of the current module (i.e. the Dart executable), and theffi.allocate<Uint32>()
function allocates memory for the icon index.Note that you need to use the
ExtractAssociatedIconW
function for Unicode (wide) strings, as Dart uses Unicode strings by default.Use the icon. Once you have extracted the icon, you can use it in your application. For example, you can display the icon in a window using the
DrawIcon
function:scssfinal hdc = GetDC(hwnd);
DrawIcon(hdc, x, y, icon);
ReleaseDC(hwnd, hdc);
This code gets the device context of a window specified by the
hwnd
variable, draws the icon at the specified coordinates (x
andy
), and then releases the device context.
These are the basic steps you need to follow to use the ExtractAssociatedIcon
function in the win32
package in Dart. Note that you may need to adjust the code depending on your specific needs and use case.