C++ dll中显示非模态对话框_cplcdlg-优快云博客

本文链接：https://blog.youkuaiyun.com/dxm809/article/details/115142741

这篇博客介绍了如何在Windows环境下通过DLL动态链接库创建并显示两个对话框：CPLCDlg和CEFEMDlg。在DLL中定义了ShowPLC和ShowEFEM两个导出函数，分别用于展示这两个对话框，并在对话框的WM_CLOSE消息处理函数中结束消息循环。在主程序中，通过LoadLibrary和GetProcAddress函数调用DLL中的函数来显示对话框。

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1 通过window桌面向导创建一个DLL,添加对话框，对应的类分别为CPLCDlg和CEFEMDlg在dll对应的cpp里面添加如下代码

extern "C" __declspec(dllexport) void ShowPLC()
{
	AFX_MANAGE_STATE(AfxGetStaticModuleState());
	CPLCDlg plcDlg;
	plcDlg.Create(IDD_DLG_PLC, NULL);
	plcDlg.ShowWindow(SW_SHOW);
	MSG msg;
	while (GetMessage(&msg, NULL, 0, 0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}

}

extern "C" __declspec(dllexport) void ShowEFEM()
{
	AFX_MANAGE_STATE(AfxGetStaticModuleState());
	CEFEMDlg efemDlg;
	efemDlg.Create(IDD_DLG_EFEM, NULL);
	efemDlg.ShowWindow(SW_SHOW);
	MSG msg;
	while (GetMessage(&msg, NULL, 0, 0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
}

2 添加两个对话框类的WM_CLOSE消息处理函数来结束上面的消息循环


void CPLCDlg::OnClose()
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	PostQuitMessage(0);
	CDialogEx::OnClose();
}


void CEFEMDlg::OnClose()
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	PostQuitMessage(0);

	CDialogEx::OnClose();
}

3 主对话框菜单处理事件


void CNanoViewView::OnToolPlc()
{
	typedef void (WINAPI* TESTDLL)();
	HINSTANCE hmod;
	hmod = ::LoadLibrary(_T("ZASCtrlLib.dll"));
	if (hmod == NULL) { AfxMessageBox(_T("Fail")); }
	TESTDLL lpproc;
	lpproc = (TESTDLL)GetProcAddress(hmod, "ShowPLC");
	if (lpproc != (TESTDLL)NULL)
		(*lpproc)();
	FreeLibrary(hmod);
	
}


void CNanoViewView::OnToolEfem()
{
	typedef void (WINAPI* TESTDLL)();
	HINSTANCE hmod;
	hmod = ::LoadLibrary(_T("ZASCtrlLib.dll"));
	if (hmod == NULL) { AfxMessageBox(_T("Fail")); }
	TESTDLL lpproc;
	lpproc = (TESTDLL)GetProcAddress(hmod, "ShowEFEM");
	if (lpproc != (TESTDLL)NULL)
		(*lpproc)();
	FreeLibrary(hmod);
}