How to Create a Windows Form Applcation in Visual C++/CLR 2012: Exploiting the power of Visual C++/CLR 2012

Transcription

1 Windows Form Applications in Visual C++/CLR 2012 How to use Visual Studio 2015 is explained at this website. You can create a new windows form application in Visual C++/CLR 2013 essentially in the same way as explained below A simple graphics program is prepared at this website. How to use GUI components of Visual C++/CLR is explained at this website. How to copy an old form is explained at this website. About errors on opening a project, check this website Programming a windows form application in Visual C++/CLR (simply,.net programming or.net Framework programming in Visual C++) lessens auxiliary programming and allows a programmer to concentrate on substantial algorithms, by which you would exploit the power of Visual C++/CLR more easily. The CLR (the Common Language Runtime) is the Microsoft version of the CLI (the Common Language Infrastructure). A column in msdn magazine (the Microsoft journal for developers) evaluates C++/CLI as follows:, what is C++/CLI? It is a first-class entry visa into the.net programming model. (see, < As a little introduction to Visual C++/CLR 2012 programming, this website consists of three parts, How to Create a New Windows Form Application, How to Hide the Console Window and Controlling Two (or More than Two) Forms. Up How to Create a New Windows Form Application Creating a new windows form application in Visual C++/CLR consists of the following two steps: 1. Prepare a new form. 2. Write simple codes to present the form. The two steps are explained below. 1. Prepare a form. Start Visual Studio 2012, and select the menu FILE New Project (Figure 1). Figure 1 The new project dialog box will appear (Figure 2). Select the template Visual C++ CLR CLR Empty Project. Figure 2 If you want to change the Name, Location or Solution name, you can set them as you like. Click OK button, then the new project will be created (Figure 3). Select the menu PROJECT Add New Item. 1/12

2 Figure 3 Add New Item window will be presented (Figure 4). Select item Visual C++ UI Windows Form and click Add button. Form designer window will be presented (Figure 5). Click Toolbox tab. Figure 4 2/12

3 Click the lying pin (Figure 6). Figure 5 Figure 6 The form designer window will be reappear (Figure 7). Copy the Button on the form by click and drag. Double click the button on the form. 3/12

4 Event handler button1_click will be automatically prepared (Figure 8). Figure 7 Figure 8 In Figure 9, this->close(); is inserted, so the form will be closed when the button is clicked. Figure 9 2. Write simple codes to present the form. Select the menu PROJECT Add New Item. Add New Item window will appear (Figure 10). 4/12

5 Figure 10 Choose the template Visual C++ Code C++ File (.cpp), then click Add button. The source code file will be prepared (Figure 11). Write the following codes (Figure 12): Figure 11 #include "MyForm.h" // The header file of the form using namespace Project1; // The name of the namespace in MyForm.h [STAThreadAttribute] // Run this program in STA mode int main(){ MyForm fm; // The form to be created and shown fm.showdialog(); // Show the form return 0; } Figure 12 The included file MyForm.h, namespace Project1 and ref class name MyForm correspond to those for the window form to be presented (Figure 13). 5/12

6 Figure 13 After you finished the above work, click BUILD Build Solution menu (Figure 14). Figure 14 If Build succeeded (Figure 15), then press the function key F5 to run the program. A console window will appear (Figure 16). Figure /12

7 Then the form will appear (Figure 17). Figure 16 Figure 17 How to Hide the Console Window If you don t want the console window to appear, set the two properties of the project, SubSystem and Entry Point, as follows. Click menu PROJECT (project name) Properties (Figure 18). 7/12

8 Figure 18 Property Pages window will appear (Figure 19). Select Configuration Properties Linker System, then Click cell SubSystem A button will appear at the right end of the cell (Figure 20). Figure 19 Click the button, then a list of values will be presented (Figure 21). Figure /12

9 Figure 21 Select Windows (/SUBSYSTEM:WINDOWS), then push Apply button (Figure 22). Figure 22 Next, Select Linker Advanced, then property Entry Point will be shown (Figure 23). 9/12

10 Figure 23 As Entry Point value, enter the same name main as in the source code file, then push Apply button (Figure 24). Figure 24 Click OK button. After the above setting of the two properties of the project, the console window will not appear. How to use components in Visual C++/CLR is explained at this website. Controlling Two (or More than Two) Forms If you create a Windows form application on an Empty Project, several forms can be handled at the same level. For example, in the following program, two forms are alternately presented on clicking the buttons. #include "MyForm.h" #include "MyFormNoFrame.h" #include "common.h" using namespace TwoForms; [STAThreadAttribute] int main(){ MyForm mf; MyFormNoFrame mfnf; ck_exit = false; do{ mf.showdialog(); if (ck_exit) break; mfnf.showdialog(); if (ck_exit) break; }while(true); return 0; } Variable ck_exit is declared in header file common.h and defined in code file common.cpp. The program is zipped in TwoForms.zip, which can be down loaded by click. Unzipped files can be opened by Visual Studio If error messages are shown (Figure A1), you can simply ignore them. 10/12

11 Figure A1 If an error concerning a pane, on which forms would be displayed, is shown, delete the pane that caused the error by clicking X on the tab. Then, reopen the pane by double clicking the name in Solution Explorer. The form or the file will be opened without troulbes. The two forms are designed as Figure25. Properties of form MyFormNoFrame are set as Figure 26. Figure /12

12 Properties of button Next are set as Figure 27. Figure 26 Figure 27 Up Yasuharu Okamoto 12/12