你需要知道为什么我们需要子类化控件。
子类化现有控件是创建自定义控件的另一种方法
控制。子类过程可以改变选择的行为
通过处理那些影响选定对象的消息来控制
行为。所有其他消息都传递给原始窗口过程
为控制。例如，一个应用程序可以显示一个小的
只读单行编辑控件中文本旁边的位图
子类化控件并处理WM_PAINT 消息。
参考：Subclassing the Window Class of an Existing Control
从您提供的link 看来，您似乎没有按照教程学习如何对控件进行子类化。
但现在看来你需要一个完整的例子来学习。
所以第一步是使用官方模板，看下面的截图：
创建后，就可以开始继承静态控件了。
将以下消息事件添加到WndProc 函数。
case WM_CREATE:
{
hWndStatic = CreateWindowEx(0, L"Static", NULL, WS_CHILD | WS_VISIBLE | SS_LEFT, 10, 130, 200, 40, hWnd, (HMENU)IDC_OWNERDRAWBUTTON, hInst, NULL);
SetWindowSubclass(hWndStatic, &OwnerDrawButtonProc, IDC_OWNERDRAWBUTTON, 0);
return TRUE;
}
break;
最后，添加子类控件的回调函数。
TCHAR szText[] = _T("TestString");
LRESULT CALLBACK OwnerDrawButtonProc(HWND hWnd, UINT uMsg, WPARAM wParam,
LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData)
{
switch (uMsg)
{
case WM_PAINT:
{
RECT rc;
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd, &ps);
GetClientRect(hWnd, &rc);
SetTextColor(hdc, RGB(255, 0, 255));
DrawText(hdc, szText, _tcslen(szText), &rc, DT_CENTER | DT_VCENTER);
EndPaint(hWnd, &ps);
return 0;
}
case WM_NCDESTROY:
RemoveWindowSubclass(hWnd, &OwnerDrawButtonProc, 1);
break;
}
return DefSubclassProc(hWnd, uMsg, wParam, lParam);
}
注意：不要忘记声明新创建的函数
完整示例：
// Test_SetWindowSubclass.cpp : Defines the entry point for the application.
//
#include "stdafx.h"
#include "Test_SetWindowSubclass.h"
#include <commctrl.h>
#pragma comment(lib,"Comctl32.lib")
#define MAX_LOADSTRING 100
#define IDC_OWNERDRAWBUTTON 101
// Global Variables:
HINSTANCE hInst; // current instance
WCHAR szTitle[MAX_LOADSTRING]; // The title bar text
WCHAR szWindowClass[MAX_LOADSTRING]; // the main window class name
HWND hWndStatic;
// Forward declarations of functions included in this code module:
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK OwnerDrawButtonProc(HWND hWnd, UINT uMsg, WPARAM wParam,
LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData);
int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
_In_opt_ HINSTANCE hPrevInstance,
_In_ LPWSTR lpCmdLine,
_In_ int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);
// TODO: Place code here.
// Initialize global strings
LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadStringW(hInstance, IDC_TESTSETWINDOWSUBCLASS, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);
// Perform application initialization:
if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
}
HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_TESTSETWINDOWSUBCLASS));
MSG msg;
// Main message loop:
while (GetMessage(&msg, nullptr, 0, 0))
{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return (int) msg.wParam;
}
//
// FUNCTION: MyRegisterClass()
//
// PURPOSE: Registers the window class.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEXW wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_TESTSETWINDOWSUBCLASS));
wcex.hCursor = LoadCursor(nullptr, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = MAKEINTRESOURCEW(IDC_TESTSETWINDOWSUBCLASS);
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
return RegisterClassExW(&wcex);
}
//
// FUNCTION: InitInstance(HINSTANCE, int)
//
// PURPOSE: Saves instance handle and creates main window
//
// COMMENTS:
//
// In this function, we save the instance handle in a global variable and
// create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
hInst = hInstance; // Store instance handle in our global variable
HWND hWnd = CreateWindowW(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, nullptr, nullptr, hInstance, nullptr);
if (!hWnd)
{
return FALSE;
}
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
return TRUE;
}
//
// FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
// PURPOSE: Processes messages for the main window.
//
// WM_COMMAND - process the application menu
// WM_PAINT - Paint the main window
// WM_DESTROY - post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_CREATE:
{
hWndStatic = CreateWindowEx(0, L"Static", NULL, WS_CHILD | WS_VISIBLE | SS_LEFT, 10, 130, 200, 40, hWnd, (HMENU)IDC_OWNERDRAWBUTTON, hInst, NULL);
SetWindowSubclass(hWndStatic, &OwnerDrawButtonProc, IDC_OWNERDRAWBUTTON, 0);
return TRUE;
}
break;
case WM_COMMAND:
{
int wmId = LOWORD(wParam);
// Parse the menu selections:
switch (wmId)
{
case IDM_ABOUT:
DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
break;
case IDM_EXIT:
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
}
break;
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code that uses hdc here...
EndPaint(hWnd, &ps);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
// Message handler for about box.
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
UNREFERENCED_PARAMETER(lParam);
switch (message)
{
case WM_INITDIALOG:
return (INT_PTR)TRUE;
case WM_COMMAND:
if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
{
EndDialog(hDlg, LOWORD(wParam));
return (INT_PTR)TRUE;
}
break;
}
return (INT_PTR)FALSE;
}
TCHAR szText[] = _T("TestString");
LRESULT CALLBACK OwnerDrawButtonProc(HWND hWnd, UINT uMsg, WPARAM wParam,
LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData)
{
switch (uMsg)
{
case WM_PAINT:
{
RECT rc;
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd, &ps);
GetClientRect(hWnd, &rc);
SetTextColor(hdc, RGB(255, 0, 255));
DrawText(hdc, szText, _tcslen(szText), &rc, DT_CENTER | DT_VCENTER);
EndPaint(hWnd, &ps);
return 0;
}
case WM_NCDESTROY:
RemoveWindowSubclass(hWnd, &OwnerDrawButtonProc, 1);
break;
}
return DefSubclassProc(hWnd, uMsg, wParam, lParam);
}
调试：
在了解了控件子类化的过程后，您可以查看 Remy 给您的评论。