c# - 需要 RegisterWindowMessage 和 SendMessage 从 c++ 到 c# 的帮助

Question

我在 C# 中有这段代码:

[DllImport("user32.dll", CharSet = CharSet.Unicode)]
static extern uint RegisterWindowMessage(string lpProcName);

[DllImport("user32.dll")]
private static extern IntPtr SendMessage(
   IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);

我需要将其从 C++ 转换为 C#:

UINT UWM_UART_CTRL_TRS = ::RegisterWindowMessage(_T("BT_UARTCTRL_TRANSFER"));
::SendMessage(HWND_BROADCAST, UWM_UART_CTRL_TRS, 0, 0);

还有这个:

UINT UWM_UART_CTRL_TRS = ::RegisterWindowMessage(_T("BT_UARTCTRL_TRANSFER"));
::SendMessage(HWND_BROADCAST, UWM_UART_CTRL_TRS, 1, 0);

提前致谢

Answer 1

应该很简单。您需要在包含它们的类中将 PInvoke 定义更改为 public:

public class Win32Api
{
   [DllImport("user32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
   public static extern uint RegisterWindowMessage(string lpString);

   [DllImport("user32.dll", SetLastError = true)]
   public static extern IntPtr SendMessage(
      IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
}

然后对于调用，它们看起来像这样:

uint UWM_UART_CTRL_TRS = Win32Api.RegisterWindowMessage("BT_UARTCTRL_TRANSFER");
Win32Api.SendMessage(HWND_BROADCAST, UWM_UART_CTRL_TRS, (IntPtr)0, (IntPtr)0);

还有这个:

uint UWM_UART_CTRL_TRS = Win32Api.RegisterWindowMessage("BT_UARTCTRL_TRANSFER");
Win32Api.SendMessage(HWND_BROADCAST, UWM_UART_CTRL_TRS, (IntPtr)1, (IntPtr)0);