# Windows API 中的自定义控件 > 原文： [http://zetcode.com/gui/winapi/customcontrols/](http://zetcode.com/gui/winapi/customcontrols/) 在这里，我们将演示如何创建自己的自定义控件。 Windows API 具有各种预先构建的控件的集合。 必须手动创建更多特定的控件。 我们使用 GDI 创建自定义控件。 ## 刻录控件 可以在各种媒体刻录应用中找到此控件，例如 Nero 刻录 ROM。 ```c #include <windows.h> #include <commctrl.h> #include <wchar.h> LRESULT CALLBACK PanelProc(HWND, UINT, WPARAM, LPARAM); LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); HINSTANCE g_hinst; LRESULT g_pos = 150; int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PWSTR lpCmdLine, int nCmdShow) { HWND hwnd; MSG msg; WNDCLASSW wc = {0}; wc.lpszClassName = L"Application"; wc.hInstance = hInstance; wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE); wc.lpfnWndProc = WndProc; wc.hCursor = LoadCursor(0, IDC_ARROW); g_hinst = hInstance; RegisterClassW(&wc); hwnd = CreateWindowW(wc.lpszClassName, L"Burning control", WS_OVERLAPPEDWINDOW | WS_VISIBLE | WS_CLIPCHILDREN, 100, 100, 400, 250, 0, 0, hInstance, 0); while( GetMessage(&msg, NULL, 0, 0)) { DispatchMessage(&msg); } return (int) msg.wParam; } LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) { static HWND hwndTrack, hwndBurn; WNDCLASSW rwc = {0}; INITCOMMONCONTROLSEX InitCtrlEx; InitCtrlEx.dwSize = sizeof(INITCOMMONCONTROLSEX); InitCtrlEx.dwICC = ICC_BAR_CLASSES; InitCommonControlsEx(&InitCtrlEx); switch(msg) { case WM_CREATE: rwc.lpszClassName = L"BurningControl"; rwc.hbrBackground = GetSysColorBrush(COLOR_BTNFACE); rwc.style = CS_HREDRAW; rwc.lpfnWndProc = PanelProc; rwc.hCursor = LoadCursor(0, IDC_ARROW); RegisterClassW(&rwc); hwndBurn = CreateWindowExW(WS_EX_STATICEDGE , L"BurningControl", NULL, WS_CHILD | WS_VISIBLE, 0, 330, 490, 30, hwnd, (HMENU)1, NULL, NULL); hwndTrack = CreateWindowExW(0, TRACKBAR_CLASSW, NULL, WS_CHILD | WS_VISIBLE | TBS_FIXEDLENGTH | TBS_NOTICKS, 40, 25, 150, 25, hwnd, (HMENU) 2, g_hinst, NULL); SendMessage(hwndTrack, TBM_SETRANGE, TRUE, MAKELONG(0, 750)); SendMessage(hwndTrack, TBM_SETPAGESIZE, 0, 20); SendMessage(hwndTrack, TBM_SETTICFREQ, 20, 0); SendMessage(hwndTrack, TBM_SETPOS, TRUE, 150); break; case WM_SIZE: SetWindowPos(hwndBurn, NULL, 0, HIWORD(lParam)-30, LOWORD(lParam), 30, SWP_NOZORDER); break; case WM_HSCROLL: g_pos = SendMessage(hwndTrack, TBM_GETPOS, 0, 0); InvalidateRect(hwndBurn, NULL, TRUE); break; case WM_DESTROY: PostQuitMessage(0); break; } return DefWindowProcW(hwnd, msg, wParam, lParam); } LRESULT CALLBACK PanelProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) { HBRUSH hBrushYellow, hBrushRed, holdBrush; HPEN hPen, holdPen; HFONT hFont, holdFont; PAINTSTRUCT ps; RECT rect, rect2; wchar_t *cap[] = { L"75", L"150", L"225", L"300", L"375", L"450", L"525", L"600", L"675"}; HDC hdc; int till; int step, full; int i; switch(msg) { case WM_PAINT: hdc = BeginPaint(hwnd, &ps); GetClientRect(hwnd, &rect); till = (rect.right / 750.0) * g_pos; step = rect.right / 10.0; full = (rect.right / 750.0) * 700; hBrushYellow = CreateSolidBrush(RGB(255, 255, 184)); hBrushRed = CreateSolidBrush(RGB(255, 110, 110)); hPen = CreatePen(PS_NULL, 1, RGB(0, 0, 0)); holdPen = SelectObject(hdc, hPen); hFont = CreateFontW(13, 0, 0, 0, FW_MEDIUM, 0, 0, 0, 0, 0, 0, 0, 0, L"Tahoma"); holdFont = SelectObject(hdc, hFont); if(till > full) { SelectObject(hdc, hBrushYellow); Rectangle(hdc, 0, 0, full, 30); holdBrush = SelectObject(hdc, hBrushRed); Rectangle(hdc, full, 0, till, 30); } else { holdBrush = SelectObject(hdc, hBrushYellow); Rectangle(hdc, 0, 0, till, 30); } SelectObject(hdc, holdPen); for ( i = 1; i < 10; i++) { MoveToEx(hdc, i*step, 0, NULL); LineTo(hdc, i*step, 7); rect2.bottom = 28; rect2.top = 8; rect2.left = i*step-10; rect2.right = i*step+10; SetBkMode(hdc, TRANSPARENT) ; DrawTextW(hdc, cap[i-1], wcslen(cap[i-1]), &rect2, DT_CENTER); } SelectObject(hdc, holdBrush); DeleteObject(hBrushYellow); DeleteObject(hBrushRed); DeleteObject(hPen); SelectObject(hdc, holdFont); DeleteObject(hFont); EndPaint(hwnd, &ps); break; } return DefWindowProcW(hwnd, msg, wParam, lParam); } ``` 在我们的示例中，我们显示一个轨迹栏控件和我们的自定义刻录控件。 跟踪栏控件用于控制刻录控件的状态。 刻录控件是一个简单的窗口。 它放置在父窗口的底部。 它在`WM_PAINT`消息期间被完全绘制。 使用 GDI 函数调用绘制线条，文本和背景。  图：刻录控件 在 Windows API 教程的这一部分中，我们创建了刻录自定义控件。