46 lines
1.2 KiB
Go
46 lines
1.2 KiB
Go
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//go:build windows
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package wintray
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import (
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"unsafe"
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"golang.org/x/sys/windows"
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)
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// Contains window class information.
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// It is used with the RegisterClassEx and GetClassInfoEx functions.
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// https://msdn.microsoft.com/en-us/library/ms633577.aspx
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type wndClassEx struct {
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Size, Style uint32
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WndProc uintptr
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ClsExtra, WndExtra int32
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Instance, Icon, Cursor, Background windows.Handle
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MenuName, ClassName *uint16
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IconSm windows.Handle
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}
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// Registers a window class for subsequent use in calls to the CreateWindow or CreateWindowEx function.
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// https://msdn.microsoft.com/en-us/library/ms633587.aspx
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func (w *wndClassEx) register() error {
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w.Size = uint32(unsafe.Sizeof(*w))
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res, _, err := pRegisterClass.Call(uintptr(unsafe.Pointer(w)))
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if res == 0 {
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return err
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}
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return nil
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}
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// Unregisters a window class, freeing the memory required for the class.
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// https://msdn.microsoft.com/en-us/library/ms644899.aspx
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func (w *wndClassEx) unregister() error {
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res, _, err := pUnregisterClass.Call(
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uintptr(unsafe.Pointer(w.ClassName)),
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uintptr(w.Instance),
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)
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if res == 0 {
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return err
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}
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return nil
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}
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