我可以将Windows 32应用程序转换为Windows窗体应用程序吗？

我正在使用的程序在使用Windows窗体时非常复杂。在大多数在线教程中，您可以双击一个按钮，例如，它会打开一个简单的.cpp文件来处理按钮及其属性。我刚刚添加了一个windows
组合框，双击时我会弹出一个显示Add Class的弹出窗口。我不想通过给出一个特殊属性来搞砸整个项目，这些属性会混淆其他属性。

The program I am using has really complicated things when working with Windows Forms. In most tutorials online you can double-click a button for example and it opens up a simple .cpp file to work with the button and its properties. I just added a windows combo box and when double-clicking I get a pop-up window that says Add Class. I don't want to screw up the entire project by giving one dialog box special properties which messes up the other ones.

现在我使用复杂的代码和LRESULT CALLBACK来处理对话框。以下是将鼠标悬停在图形上时更改简单文本的示例代码：

Right now I use complicated code and LRESULT CALLBACK to deal with dialog boxes. Here's the code for example for changing simple text when hovering over a graphic:

int element = checkEventInfo(id);
if (element != -1) {
SetWindowText(GetDlgItem(hWID[7], IDC_ENEMYNAME), getEventInfoText(element).c_str());
}

在Visual Studio文档中（我使用VS 2015顺便说一句），它说使用以下代码将字符串添加到组合框：

In the Visual Studio documentation (Im using VS 2015 btw) it says use to following code to add a string to a combobox:

comboBox1->Items->Add("Tokyo");  

但是，我不知道在代码中插入的位置，或者甚至可以使用。在我的组合框中，右上角没有小箭头，我可以右键单击并选择添加项目。即使属性框中的Data属性也显示为灰色，因此
我无法手动添加项目。为什么我的项目如此复杂？我必须为所有事情做另一步。

However, I have no clue where to insert that in the code, or if that will even work. In my combo box there is no little arrow in the top-right corner where I can right-click and select Add Items. Even the Data property in the property box is grayed out so I can't manually add items. Why is my project so complicated? I have to do another step for everything.