從C ++到C＃需要RegisterWindowMessage和SendMessage的幫助

Question

我在C＃中有以下代碼：

[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);

我需要將其從C ++轉換為C＃：

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

和這個：

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

提前致謝

Answer 1

應該很簡單。 您需要將PInvoke定義更改為包含它們的類內的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，對於呼叫，它們將如下所示：

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

和這個：

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