使用 Windows API 用 C 语言编程：如何绘制命令按钮
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Programming in C With Windows API: How To Draw A Command Button
提问by Ishan Sharma
Well, I am building a college project in C. GUI has not been taught yet but I want my program to be better, so I am learning Windows API.
嗯，我正在用 C 构建一个大学项目。 GUI 还没有被教授，但我希望我的程序更好，所以我正在学习 Windows API。
I am following this tutorial here: http://www.winprog.org/tutorial/start.htmland it is quite good. It explains lot of things but I am not able to find one thing(even searched Google but everything is oriented towards C++ or C#):
我在这里关注本教程：http: //www.winprog.org/tutorial/start.html，它非常好。它解释了很多事情，但我找不到一件事（甚至搜索过谷歌，但一切都面向 C++ 或 C#）：
How do I draw a command button inside the drawn window(which I have learned) and how to accept events for it?
如何在绘制的窗口内绘制命令按钮（我已经学会了）以及如何为其接受事件？
Can you please answer or point me to a good page that explains how I can create a command button using ONLY Windows API and C. No C++ please.
您能否回答或指向一个很好的页面，该页面解释了我如何仅使用 Windows API 和 C 创建命令按钮。请不要使用 C++。
Thanks for your time! :)
谢谢你的时间！:)
回答by
Thisis a tutorial I highly recommend on the Win32 API user interface functions. It's excellent. Roughly speaking, in your callback function (LRESULT CALLBACK WndProc( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam )you have several options you can catch:
这是我强烈推荐的关于 Win32 API 用户界面功能的教程。它很棒。粗略地说，在你的回调函数中（LRESULT CALLBACK WndProc( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam )你有几个可以捕捉的选项：
switch(msg)
{
case WM_CREATE:
break;
case WM_COMMAND:
break;
/* .. */
}
What you need to do on WM_CREATEis something like this:
你需要做的WM_CREATE是这样的：
HWND hWnd_button = CreateWindow(TEXT("button"), TEXT("Quit"),
WS_VISIBLE | WS_CHILD ,
20, 50, 80, 25,
hwnd, (HMENU) 1, NULL, NULL);
The reason I've stored the HWNDof that button is that if you want to alter the button at a later date, you'll need that Handle as an argument for SendMessage(). Now, next up, catching a click. When the button is clicked, it sends WM_COMMANDto the parent window with the HMENUcasted argument (1 in this case) in wParam. This works for every control you create (menus, checkboxes etc - if they post more complicated options they may be present in lParam). So:
我存储该HWND按钮的原因是，如果您想在以后更改该按钮，您将需要该 Handle 作为SendMessage(). 现在，接下来，点击一下。当点击该按钮时，将其发送WM_COMMAND到与所述父窗口HMENU中（在这种情况下1）铸造参数wParam。这适用于您创建的每个控件（菜单、复选框等 - 如果它们发布更复杂的选项，它们可能会出现在 中lParam）。所以：
case WM_COMMAND:
if (LOWORD(wParam) == 1) {
DestroyWindow();
/* or SendMessage(hwnd, WM_CLOSE,0,0); see commments */
}
break;
Catches that particular option. Inside the ifhandles that button event.
抓住那个特定的选项。里面if处理那个按钮事件。
回答by Rune Aamodt
Simply use CreateWindowwith class name "BUTTON", style BS_PUSHBUTTONand parent window as your existing drawn window. The x and y coordinates select the top-left button position in the window. The window name is the text on the button. Also, remember to call ShowWindowon the returned handle.
只需将CreateWindow类名"BUTTON"、样式BS_PUSHBUTTON和父窗口用作您现有的绘制窗口。x 和 y 坐标选择窗口中左上角的按钮位置。窗口名称是按钮上的文本。另外，请记住调用ShowWindow返回的句柄。
edit: To accept events for it, first define an ID value like:
编辑：要接受它的事件，首先定义一个 ID 值，如：
#define ID_MYBUTTON 1
#define ID_MYBUTTON 1
Then pass that into the menu-parameter of the CreateWindow call. In your main windows message proc you can now find message by testing for:
然后将其传递到 CreateWindow 调用的菜单参数中。在您的主窗口消息过程中，您现在可以通过测试以下内容来查找消息：
if(message == WM_COMMAND && HIWORD(wParam) == BN_CLICKED && LOWORD(wParam) == ID_MYBUTTON) { /* button was clicked */ }
if(message == WM_COMMAND && HIWORD(wParam) == BN_CLICKED && LOWORD(wParam) == ID_MYBUTTON) { /* button was clicked */ }
