问一下为什么我的程序弹出的messageBox关不了,而且修改之后第二次编译的时候会不能写入，是进程没有关掉吗?

[qq_40669215]

// graphics.cpp : 定义应用程序的入口点。
//

#include "framework.h"
#include "graphics.h"
#include <string.h>
#include <atltypes.h>
#include "uart.h"
#include "serialcom.h"

#define MAX_LOADSTRING 100

// 全局变量:
HINSTANCE hInst;								// 当前实例
WCHAR szTitle[MAX_LOADSTRING];                  // 标题栏文本
WCHAR szWindowClass[MAX_LOADSTRING];			// 主窗口类名	

// 此代码模块中包含的函数的前向声明:
BOOL                InitInstance(HINSTANCE, int);
LRESULT CALLBACK    WndProc(HWND, UINT, WPARAM, LPARAM);
BOOL CALLBACK DialogProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam);
INT_PTR CALLBACK    About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
                     _In_opt_ HINSTANCE hPrevInstance,
                     _In_ LPWSTR    lpCmdLine,
                     _In_ int       nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);

    // TODO: 在此处放置代码。
	
    // 初始化全局字符串
    LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
	LoadStringW(hInstance, IDC_GRAPHICS, szWindowClass, MAX_LOADSTRING);

    // 执行应用程序初始化:
    if (!InitInstance (hInstance, nCmdShow))
    {
        return FALSE;
    }

    HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_GRAPHICS));

    MSG msg;

    // 主消息循环:
    while (GetMessage(&msg, NULL, 0, 0))
    {
        if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }

    return (int) msg.wParam;
}

//
//   函数: InitInstance(HINSTANCE, int)
//
//   目标: 保存实例句柄并创建主窗口
//
//   注释:
//
//        在此函数中，我们在全局变量中保存实例句柄并
//        创建和显示主程序窗口。
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   hInst = hInstance; // 将实例句柄存储在全局变量中
   /*主窗口*/
   HWND hWnd = CreateDialogW(hInst, MAKEINTRESOURCE(IDD_DIALOG_UART), NULL, About);
   if (!hWnd)
   {
      return FALSE;
   }

   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);

   return TRUE;
}


//文本框的处理程序。
BOOL CALLBACK DialogProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	switch (uMsg)
	{	
	case WM_COMMAND:
		MessageBox(hwndDlg, L"点击了文本框!\n", L"成功", MB_OK);
	}
	return (INT_PTR)FALSE;
}

// “关于”框的消息处理程序。
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
    UNREFERENCED_PARAMETER(lParam);
	static HWND hOpen;                   /*打开串口句柄*/
	static HWND hBaudRate;				 /*波特率句柄*/
	static HWND hGet;				     /*收数据框句柄*/
	static HWND hSend;				     /*发数据框句柄*/
	static HWND hDefCom;				 /*默认单选句柄*/
	static DWORD dwBaudrate = 1200;      /*波特率大小*/
	static int iPushtimes = 0;           /*波特率按钮按下次数*/
	static BOOL bOpenUart = FALSE;       /*是否打开了串口*/
	static uart myuart;                  /*串口对象*/
	TCHAR buffer[255];					/*UNICODE数据缓存*/
	char cBuffer[255];					/*ANSI*/
	DWORD baudrate;						/*波特率*/
    switch (message)
    {
    case WM_INITDIALOG:
		hOpen = GetDlgItem(hDlg, IDC_BUTTON_OPENCOMM);
		hBaudRate = GetDlgItem(hDlg, IDC_COMBO_BAUDRATE);
		hGet = GetDlgItem(hDlg, IDC_EDIT_RECEIVE);
		hSend = GetDlgItem(hDlg, IDC_EDIT_SEND);
		myuart.inithRec(hGet);
		SendMessage(hBaudRate, CB_ADDSTRING, 0, (LPARAM)_T("4800"));
		SendMessage(hBaudRate, CB_ADDSTRING, 0, (LPARAM)_T("9600"));
		SendMessage(hBaudRate, CB_ADDSTRING, 0, (LPARAM)_T("115200"));
		SendMessage(hBaudRate, CB_SETCURSEL, 0, 0);
        return (INT_PTR)TRUE;
    case WM_COMMAND:
		switch (LOWORD(wParam))
		{
		case IDC_BUTTON_OPENCOMM:
			SendMessage(hBaudRate, WM_GETTEXT, (WPARAM)20, (LPARAM)buffer);
			uart::TcharToChar(buffer, cBuffer);
			sscanf_s(cBuffer, "%d", &baudrate);
			if (!myuart.openCOM(baudrate))
			{
				MessageBox(hDlg, TEXT("打开串口失败!"), TEXT("错误"), MB_OK | MB_ICONERROR);
			}
		case IDC_COMBO_BAUDRATE:
			
			break;
		default:
			break;
		}
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	case WM_QUIT:
		EndDialog(hDlg, LOWORD(wParam));
		break;
    }
	return DefWindowProc(hDlg, message, wParam, lParam);
}

弹出错误框时，点X和确定都没有反应，确定按钮连图标凹陷的动画都没有。

[qq_40669215]

我发现弹窗的标题栏是灰色的而且程序一直在接收WM_NCACTIVATE信号，这个怎么解决啊

[schlafenhamster]

你的
BOOL CALLBACK DialogProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch (uMsg)
{
case WM_COMMAND:
MessageBox(hwndDlg, L"点击了文本框!\n", L"成功", MB_OK);
}
return (INT_PTR)FALSE;
}

[zgl7903]

COMMAND 中应该区分事件和ID再弹窗

//文本框的处理程序。
BOOL CALLBACK DialogProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
 switch (uMsg)
 {   
  case WM_COMMAND:
  { 
    UINT uNotify = HIWORD(wParam); //事件
    UINT uID = LOWORD(wParam);  //控件ID
    if(uNotify == BN_CLICKED && uID == IDC_XXXX)
    {
      MessageBox(hwndDlg, L"点击了文本框!\n", L"成功", MB_OK);
    }
    break;
  }  
 }
 return (INT_PTR)FALSE;
}

[schlafenhamster]

BOOL CALLBACK DialogProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch (uMsg)
{
case WM_DESTROY:
PostQuitMessage (0);
break;
case WM_COMMAND://WM_COMMAND
switch (LOWORD(wParam))
{
case IDOK:
case IDCANCEL:
DestroyWindow(hwndDlg);
return TRUE;// 消息 已 处理 ！
return TRUE;
case IDC_EDIT1:
MessageBox(hwndDlg, "点击了文本框!\n", "成功", MB_OK);
return TRUE;
}
break;
}
return FALSE;// 消息没处理 ！
}