以前写的一个关于子窗口控制的代码，很经典

#include <windows.h> #define ID_SMALLER 1 #define ID_LARGER 2 #define BTN_WIDTH (8 * cxChar) #define BTN_HEIGHT (4 * cyChar) HINSTANCE hInst; LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM); int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR szCmdLine, int iCmdShow ) { static TCHAR szAppName[]=TEXT("OwnDraw"); HWND hwnd; MSG msg; int cxWindow,cyWindow; WNDCLASS wndclass; hInst=hInstance; wndclass.style=CS_HREDRAW|CS_VREDRAW; wndclass.lpfnWndProc=WndProc; wndclass.cbClsExtra=0; wndclass.cbWndExtra=0; wndclass.hInstance=hInstance; wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION); wndclass.hCursor=LoadCursor(NULL,IDC_ARROW); wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH); wndclass.lpszMenuName=szAppName; wndclass.lpszClassName=szAppName; if(!RegisterClass(&wndclass)) { MessageBox(NULL,TEXT("This programe requires windows NT"),szAppName,MB_ICONERROR); return 0; } hwnd = CreateWindow(szAppName, TEXT("Owner Draw"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL ); ShowWindow(hwnd,iCmdShow); UpdateWindow(hwnd); while (GetMessage(&msg,NULL,0,0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return msg.wParam; } void Trlangle(HDC hdc,POINT pt[]) { SelectObject(hdc,GetStockObject(BLACK_BRUSH)); Polygon(hdc,pt,3); SelectObject(hdc,GetStockObject(WHITE_BRUSH)); } LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam) { static HWND hwndSmaller,hwndLarger; RECT rc; LPDRAWITEMSTRUCT pdis; POINT pt[3]; static int cxClient,cyClient,cxChar,cyChar; int cx,cy; switch(message) { case WM_CREATE: cxChar=LOWORD(GetDialogBaseUnits()); cyChar=HIWORD(GetDialogBaseUnits()); hwndSmaller=CreateWindow(TEXT("Button"),TEXT(""),WS_CHILD|WS_VISIBLE|BS_OWNERDRAW,0,0, BTN_WIDTH,BTN_HEIGHT,hwnd,(HMENU)ID_SMALLER,hInst,NULL); hwndLarger=CreateWindow(TEXT("Button"),TEXT(""),WS_CHILD|WS_VISIBLE|BS_OWNERDRAW,0,0, BTN_WIDTH,BTN_HEIGHT,hwnd,(HMENU)ID_LARGER,hInst,NULL); return 0; case WM_SIZE: cxClient=LOWORD(lParam); cyClient=HIWORD(lParam); MoveWindow(hwndSmaller,cxClient/2-3*BTN_WIDTH/2,cyClient/2-BTN_HEIGHT/2,BTN_WIDTH,BTN_HEIGHT,TRUE); MoveWindow(hwndLarger,cxClient/2+BTN_WIDTH/2,cyClient/2-BTN_HEIGHT/2,BTN_WIDTH,BTN_HEIGHT,TRUE); return 0; case WM_COMMAND: GetWindowRect(hwnd,&rc); switch (wParam) { case ID_SMALLER: rc.left+=cxClient/20; rc.right-=cxClient/20; rc.top+=cyClient/20; rc.bottom-=cyClient/20; break; case ID_LARGER: rc.left-=cxClient/20; rc.right+=cxClient/20; rc.top-=cyClient/20; rc.bottom+=cyClient/20; break; } MoveWindow(hwnd,rc.left,rc.top,rc.right-rc.left,rc.bottom-rc.top,TRUE); return 0; case WM_DRAWITEM: pdis=(LPDRAWITEMSTRUCT)(lParam); FillRect(pdis->hDC,&pdis->rcItem,(HBRUSH)GetStockObject(WHITE_BRUSH)); FrameRect(pdis->hDC,&pdis->rcItem,(HBRUSH)GetStockObject(BLACK_BRUSH)); cx=pdis->rcItem.right-pdis->rcItem.left; cy=pdis->rcItem.bottom-pdis->rcItem.top; switch (pdis->CtlID) { case ID_SMALLER: pt[0].x=3*cx/8;pt[0].y=1*cy/8; pt[1].x=5*cx/8;pt[1].y=1*cy/8; pt[2].x=4*cx/8;pt[2].y=3*cy/8; Trlangle(pdis->hDC,pt); pt[0].x=7*cx/8;pt[0].y=3*cy/8; pt[1].x=7*cx/8;pt[1].y=5*cy/8; pt[2].x=5*cx/8;pt[2].y=4*cy/8; Trlangle(pdis->hDC,pt); pt[0].x=5*cx/8;pt[0].y=7*cy/8; pt[1].x=3*cx/8;pt[1].y=7*cy/8; pt[2].x=4*cx/8;pt[2].y=5*cy/8; Trlangle(pdis->hDC,pt); pt[0].x=1*cx/8;pt[0].y=5*cy/8; pt[1].x=1*cx/8;pt[1].y=3*cy/8; pt[2].x=3*cx/8;pt[2].y=4*cy/8; Trlangle(pdis->hDC,pt); break; case ID_LARGER: pt[0].x=5*cx/8;pt[0].y=3*cy/8; pt[1].x=3*cx/8;pt[1].y=3*cy/8; pt[2].x=4*cx/8;pt[2].y=1*cy/8; Trlangle(pdis->hDC,pt); pt[0].x=5*cx/8;pt[0].y=5*cy/8; pt[1].x=5*cx/8;pt[1].y=3*cy/8; pt[2].x=7*cx/8;pt[2].y=4*cy/8; Trlangle(pdis->hDC,pt); pt[0].x=3*cx/8;pt[0].y=5*cy/8; pt[1].x=5*cx/8;pt[1].y=5*cy/8; pt[2].x=4*cx/8;pt[2].y=7*cy/8; Trlangle(pdis->hDC,pt); pt[0].x=3*cx/8;pt[0].y=3*cy/8; pt[1].x=3*cx/8;pt[1].y=5*cy/8; pt[2].x=1*cx/8;pt[2].y=4*cy/8; Trlangle(pdis->hDC,pt); break; } if (pdis->itemState & ODS_SELECTED) InvertRect(pdis->hDC,& pdis->rcItem); if (pdis->itemState & ODS_FOCUS) { pdis->rcItem.left+=cx/16; pdis->rcItem.top+=cy/16; pdis->rcItem.right-=cx/16; pdis->rcItem.bottom-=cy/16; DrawFocusRect(pdis->hDC,&pdis->rcItem); } return 0; case WM_DESTROY: PostQuitMessage(0); return 0; } return DefWindowProc(hwnd,message,wParam,lParam); }