2.1 获得控件的窗口句柄。

slider control也是一个窗口，是对话框的子窗口，因此，要用GetDlgItem来实现：

backlight_wnd = GetDlgItem(hDlg, IDC_SLIDER_BACKLIGHT);  //注意下面示例中蓝色标出的区别

2.2 设置slider control的区间，是给slider control发TBM_SETRANGE消息，比如我设置0到100就是：

SendMessage(backlight_wnd,TBM_SETRANGE, (WPARAM)1,(LPARAM)MAKELONG(0,100));

2.3 设置滑块的初始位置是发送TBM_SETPOS消息来实现的：

   SendMessage(backlight_wnd,TBM_SETPOS, (WPARAM)1,(LPARAM)BacklightPercentage);
2.4 slider control和用户的交互，则是通过WM_HSCROLL消息来实现的，需要在WM_HSCROLL的响应函数里面发送TBM_GETPOS消息得到当前滑块的位置：

BacklightPercentage = (unsigned char)SendMessage(backlight_wnd,TBM_GETPOS,0,0);

2.5 旁边的一个当前刻度的数字的说明，需要先设定一个Static text文本控件，然后动态给该控件发送WM_SETTEXT消息来实现动态的更新数字：

SendMessage(GetDlgItem(hDlg, IDC_STATIC_BACKLIGHT_VALUE), WM_SETTEXT, 0, LPARAM(szBacklightPercentage));

最后面的那个参数，szBacklightPercentage是一个字符串。

 

 

 

INT_PTR WINAPI DlgProcTouMingSet(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {PAINTSTRUCT ps;HDC hdcAbout;int EscKeyID=1000;int ReturnID=1001;HWND backlight_wnd;switch (uMsg){case WM_INITDIALOG:{RegisterHotKey(hwnd,EscKeyID,0,VK_ESCAPE);RegisterHotKey(hwnd,ReturnID,0,VK_RETURN);backlight_wnd = GetDlgItem(hwnd,IDC_SLIDER_TouMing);//2.2 设置slider control的区间，是给slider control发TBM_SETRANGE消息，比如我设置0到100就是：SendMessage(backlight_wnd,TBM_SETRANGE, (WPARAM)1,(LPARAM)MAKELONG(15,255));int TouMingChuShi= GetPrivateProfileInt(_T("SkinChoose"),_T("TouMing"),150,defaultFullFullPath);SendMessage(backlight_wnd,TBM_SETPOS, (WPARAM)1,TouMingChuShi);  //读取初始透明度}break;case WM_HSCROLL:{int nScrollCode = (int) LOWORD(wParam);  // scroll bar value  //int nPos = (int) HIWORD(wParam);   // scroll box position  HWND hwndScrollBar = (HWND) lParam;       // handle to scroll bar   lParam一般表示窗口句柄 		

int nPos=200;nPos=SendMessage(hwndScrollBar,TBM_GETPOS,0,0);	TCHAR TouMing[10];switch(nScrollCode){case SB_THUMBTRACK:   //用户拖动滚动框。此消息被重复发送，直到用户释放鼠标按钮。{nPos=SendMessage(hwndScrollBar,TBM_GETPOS,0,0);		_itow_s( nPos, TouMing, 10, 10);WritePrivateProfileString(_T("SkinChoose"),_T("TouMing"),TouMing,defaultFullFullPath);SetLayeredWindowAttributes(hwnd1,RGB(0,0,0),              //表示与此颜色相同的颜色将会透明    nPos,				     //表示透明度0是全透明，255是全显示LWA_ALPHA|LWA_COLORKEY   //LWA_ALPHA|LWA_COLORKEY:这样crKey的地方将变为全透明，而其它地方根据bAlpha参数确定透明度。); }break;case SB_ENDSCROLL:{nPos=SendMessage(hwndScrollBar,TBM_GETPOS,0,0);WritePrivateProfileString(_T("SkinChoose"),_T("Skin"),_T("1"),defaultFullFullPath);SetLayeredWindowAttributes(hwnd1,RGB(0,0,0),              //表示与此颜色相同的颜色将会透明    nPos,				     //表示透明度0是全透明，255是全显示LWA_ALPHA|LWA_COLORKEY   //LWA_ALPHA|LWA_COLORKEY:这样crKey的地方将变为全透明，而其它地方根据bAlpha参数确定透明度。); break;}}}break; 	case WM_HOTKEY:{switch (wParam){case 1000:{EndDialog(hwnd, LOWORD(wParam));UnregisterHotKey(hwnd,1000);}break;case 1001:{EndDialog(hwnd, LOWORD(wParam));UnregisterHotKey(hwnd,1001);}break;}}break;case WM_LBUTTONDOWN:{EndDialog(hwnd, LOWORD(wParam));return (INT_PTR)TRUE;}break;case WM_COMMAND:{UINT wmId = LOWORD(wParam);UINT wmEvent = HIWORD(wParam);switch (wmId){case IDOK:   //获取生日时间并赋值给全局变量case IDCANCEL:{EndDialog(hwnd, LOWORD(wParam));}return (INT_PTR)TRUE;}}}return (INT_PTR)FALSE;
}

 

 

 

转载于:https://my.oschina.net/ypimgt/blog/81390