从C ++到C＃需要RegisterWindowMessage和SendMessage的帮助

Question

我在C＃中有以下代码：

[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);

和这个：

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。 您需要将PInvoke定义更改为包含它们的类内的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，对于呼叫，它们将如下所示：

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

和这个：

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