func lastError(win32FuncName string) error {
if errno := win.GetLastError(); errno != win.ERROR_SUCCESS {
return newError(fmt.Sprintf("%s: Error %d", win32FuncName, errno))
}
return newError(win32FuncName)
}
func (fb *FormBase) SetOwner(value Form) error {
fb.owner = value
var ownerHWnd win.HWND
if value != nil {
ownerHWnd = value.Handle()
}
win.SetLastError(0)
if 0 == win.SetWindowLong(
fb.hWnd,
win.GWL_HWNDPARENT,
int32(ownerHWnd)) && win.GetLastError() != 0 {
return lastError("SetWindowLong")
}
return nil
}