/
winclass.go
45 lines (39 loc) · 1.2 KB
/
winclass.go
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//go:build windows
package wintray
import (
"unsafe"
"golang.org/x/sys/windows"
)
// Contains window class information.
// It is used with the RegisterClassEx and GetClassInfoEx functions.
// https://msdn.microsoft.com/en-us/library/ms633577.aspx
type wndClassEx struct {
Size, Style uint32
WndProc uintptr
ClsExtra, WndExtra int32
Instance, Icon, Cursor, Background windows.Handle
MenuName, ClassName *uint16
IconSm windows.Handle
}
// Registers a window class for subsequent use in calls to the CreateWindow or CreateWindowEx function.
// https://msdn.microsoft.com/en-us/library/ms633587.aspx
func (w *wndClassEx) register() error {
w.Size = uint32(unsafe.Sizeof(*w))
res, _, err := pRegisterClass.Call(uintptr(unsafe.Pointer(w)))
if res == 0 {
return err
}
return nil
}
// Unregisters a window class, freeing the memory required for the class.
// https://msdn.microsoft.com/en-us/library/ms644899.aspx
func (w *wndClassEx) unregister() error {
res, _, err := pUnregisterClass.Call(
uintptr(unsafe.Pointer(w.ClassName)),
uintptr(w.Instance),
)
if res == 0 {
return err
}
return nil
}