#include "resource.h"void DrawTransparentBitmap(HDC hdc,HBITMAP hBitmap, int xStart, int yStart,int xBitmap, int yBitmap, int xWidth, int yHeight,COLORREF cTransparentColor){ COLORREF cColor; HBITMAP bmAndBack, bmAndObject, bmAndMem, bmSave; HBITMAP bmBackOld, bmObjectOld, bmMemOld, bmSaveOld, bmTempOld; HDC hdcMem, hdcBack, hdcObject, hdcTemp, hdcSave; POINT ptSize; if(NULL == hdc || NULL == hBitmap)return; hdcTemp = CreateCompatibleDC(hdc); bmTempOld = (HBITMAP)SelectObject(hdcTemp, hBitmap); // Select the bitmap ptSize.x = xWidth; // Get width of bitmap ptSize.y = yHeight; // Get height of bitmap DPtoLP(hdcTemp, ptSize, 1); // Convert from device // to logical points hdcBack = CreateCompatibleDC(hdc); hdcObject = CreateCompatibleDC(hdc); hdcMem = CreateCompatibleDC(hdc); hdcSave = CreateCompatibleDC(hdc); // Create a bitmap for each DC. DCs are required for a number of // GDI functions. // Monochrome DC bmAndBack = CreateBitmap(ptSize.x, ptSize.y, 1, 1, NULL); // Monochrome DC bmAndObject = CreateBitmap(ptSize.x, ptSize.y, 1, 1, NULL); bmAndMem = CreateCompatibleBitmap(hdc, ptSize.x, ptSize.y); bmSave = CreateCompatibleBitmap(hdc, ptSize.x, ptSize.y); // Each DC must select a bitmap object to store pixel data. bmBackOld = (HBITMAP)SelectObject(hdcBack, bmAndBack); bmObjectOld = (HBITMAP)SelectObject(hdcObject, bmAndObject); bmMemOld = (HBITMAP)SelectObject(hdcMem, bmAndMem); bmSaveOld = (HBITMAP)SelectObject(hdcSave, bmSave); // Set proper mapping mode. SetMapMode(hdcTemp, GetMapMode(hdc)); // Save the bitmap sent here, because it will be overwritten. BitBlt(hdcSave, 0, 0, ptSize.x, ptSize.y, hdcTemp, xBitmap, yBitmap, SRCCOPY); // Set the background color of the source DC to the color. // contained in the parts of the bitmap that should be transparent cColor = SetBkColor(hdcTemp, cTransparentColor); // Create the object mask for the bitmap by performing a BitBlt() // from the source bitmap to a monochrome bitmap. BitBlt(hdcObject, 0, 0, ptSize.x, ptSize.y, hdcTemp, xBitmap, yBitmap, SRCCOPY); // Set the background color of the source DC back to the original // color. SetBkColor(hdcTemp, cColor); // Create the inverse of the object mask. BitBlt(hdcBack, 0, 0, ptSize.x, ptSize.y, hdcObject, 0, 0, NOTSRCCOPY); // Copy the background of the main DC to the destination. BitBlt(hdcMem, 0, 0, ptSize.x, ptSize.y, hdc, xStart, yStart, SRCCOPY); // Mask out the places where the bitmap will be placed. BitBlt(hdcMem, 0, 0, ptSize.x, ptSize.y, hdcObject, 0, 0, SRCAND); // Mask out the transparent colored pixels on the bitmap. BitBlt(hdcTemp, xBitmap, yBitmap, ptSize.x, ptSize.y, hdcBack, 0, 0, SRCAND); // XOR the bitmap with the background on the destination DC. BitBlt(hdcMem, 0, 0, ptSize.x, ptSize.y, hdcTemp, xBitmap, yBitmap, SRCPAINT); // Copy the destination to the screen. BitBlt(hdc, xStart, yStart, ptSize.x, ptSize.y, hdcMem, 0, 0, SRCCOPY); // Place the original bitmap back into the bitmap sent here. BitBlt(hdcTemp, xBitmap, yBitmap, ptSize.x, ptSize.y, hdcSave, 0, 0, SRCCOPY); // Delete the memory bitmaps. SelectObject(hdcTemp, bmTempOld); DeleteObject(SelectObject(hdcBack, bmBackOld)); DeleteObject(SelectObject(hdcObject, bmObjectOld)); DeleteObject(SelectObject(hdcMem, bmMemOld)); DeleteObject(SelectObject(hdcSave, bmSaveOld)); // Delete the memory DCs. DeleteDC(hdcMem); DeleteDC(hdcBack); DeleteDC(hdcObject); DeleteDC(hdcSave); DeleteDC(hdcTemp);class CModify : public CDialogDECLARE_MESSAGE_MAP()public:CModify(CWnd *pParent = NULL);enum { IDD = IDD_MODIFY};public:virtual BOOL OnInitDialog();virtual void DoDataExchange(CDataExchange* pDX);virtual void OnOK();virtual void OnCancel();protected:afx_msg void OnPaint();public:CString m_strOldPwd;private:CString m_strNewPwd;CString m_strReNewPwd;private:CBitmap m_bitmap;BEGIN_MESSAGE_MAP(CModify,CDialog)ON_WM_PAINT()END_MESSAGE_MAP()CModify::CModify(CWnd *pParent) : CDialog(CModify::IDD)BOOL CModify::OnInitDialog()if(!CDialog::OnInitDialog())return FALSE;m_bitmap.LoadBitmap(IDB_BITMAP_MODIFY);UpdateData(FALSE);return TRUE;void CModify::DoDataExchange(CDataExchange* pDX)CDialog::DoDataExchange(pDX);DDX_Text(pDX,IDC_OLDPWD,m_strOldPwd);void CModify::OnOK()CDialog::OnOK();void CModify::OnCancel()CDialog::OnCancel();void CModify::OnPaint()CPaintDC dc(this);CRect rect;GetClientRect( rect);if(m_bitmap.GetSafeHandle())DrawTransparentBitmap( dc.GetSafeHdc(), (HBITMAP)m_bitmap.GetSafeHandle(), 0, 0, 0, 0,rect.Width(), rect.Height(), RGB(0,255,0) );class CLogin : public CDialogDECLARE_MESSAGE_MAP()public:CLogin(CWnd *pParent = NULL);enum{ IDD = IDD_LOGIN };public:virtual BOOL OnInitDialog();virtual void DoDataExchange(CDataExchange* pDX);virtual void OnOK();virtual void OnCancel();protected:afx_msg void OnPaint();afx_msg HBRUSH OnCtlColor(CDC *pDC,CWnd *pWnd,UINT nCtlColor);afx_msg void OnLButtonDown(UINT nFlags,CPoint point);public:BOOL Search();private:CBitmap m_bitmap;private:CString m_strName;CString m_strPwd;CButton m_wndSave;CButton m_wndAuto;UINT nSave;UINT nAuto;private:_ConnectionPtr m_pConection;_RecordsetPtr m_pRecordset;BEGIN_MESSAGE_MAP(CLogin,CDialog)ON_WM_PAINT()ON_WM_CTLCOLOR()ON_WM_LBUTTONDOWN()END_MESSAGE_MAP()CLogin::CLogin(CWnd *pParent) : CDialog(CLogin::IDD),m_strName(""),m_strPwd(""),nSave(0),nAuto(0)BOOL CLogin::OnInitDialog()if(!CDialog::OnInitDialog())return FALSE;m_pConection.CreateInstance(__uuidof(Connection));_bstr_t strCon = "Provider=MSDASQL.1;Data Source=stock";m_pConection- Open(strCon,"","",adModeUnknown);catch(_com_error e)CString strError;strError.Format("%s",e.ErrorMessage());MessageBox(strError,"错误提示",MB_OK);m_bitmap.LoadBitmap(IDB_BITMAP_LOGIN);return TRUE;void CLogin::DoDataExchange(CDataExchange* pDX)CDialog::DoDataExchange(pDX);DDX_Text(pDX,IDC_NAME,m_strName);DDX_Text(pDX,IDC_PWD,m_strPwd);HBRUSH CLogin::OnCtlColor(CDC *pDC,CWnd *pWnd,UINT nCtlColor)HBRUSH hbr = CDialog::OnCtlColor(pDC,pWnd,nCtlColor);if(nCtlColor == CTLCOLOR_STATIC)pDC- SetTextColor(RGB(255,0,0));pDC- SetBkColor(RGB(255,255,255));return hbr;void CLogin::OnLButtonDown(UINT nFlags,CPoint point)if(!Search())MessageBox("密码错误，请重新输入密码 !","提示",MB_OK);return CRect rect;CWnd *pWnd = GetDlgItem(IDC_MODIFY);pWnd- GetWindowRect( rect);ScreenToClient( rect);if(point.x rect.left point.x rect.right point.y rect.top point.y rect.bottom)CModify dlg;dlg.m_strOldPwd = this- m_strPwd;dlg.DoModal();this- m_strPwd = dlg.m_strOldPwd;void CLogin::OnPaint()CPaintDC dc(this);CRect rect;GetClientRect( rect);if( m_bitmap.GetSafeHandle() )DrawTransparentBitmap( dc.GetSafeHdc(), (HBITMAP)m_bitmap.GetSafeHandle(), 0, 0, 0, 0,rect.Width(), rect.Height(), RGB(0,255,0) );BOOL CLogin::Search()UpdateData(TRUE);_bstr_t vName,vPwd;m_pRecordset.CreateInstance(__uuidof(Recordset));_bstr_t strSql = "select * from user";m_pRecordset- Open(strSql,(IDispatch*)m_pConection,adOpenStatic,adLockOptimistic,adCmdText);while(!m_pRecordset- adoEOF)vName = m_pRecordset- Fields- GetItem("name")- Value;vPwd = m_pRecordset- Fields- GetItem("pwd")- Value;if(vName == m_strName vPwd == m_strPwd){return TRUE;m_pRecordset- MoveNext();m_pRecordset- Close();catch(_com_error e)CString strError;strError.Format("%s",e.ErrorMessage());MessageBox(strError,"错误提示",MB_OK);m_pRecordset- Close();return FALSE;void CLogin::OnOK()if(Search())CDialog::OnOK();MessageBox("密码错误，请重新输入密码 !","提示",MB_OK);return void CLogin::OnCancel()CDialog::OnCancel();class CMyApp : public CWinApppublic:virtual BOOL InitInstance();virtual int ExitInstance();CMyApp theApp;BOOL CMyApp::InitInstance()AfxOleInit();CLogin dlg;dlg.DoModal();return TRUE;int CMyApp::ExitInstance()AfxOleTerm(FALSE);return CWinApp::ExitInstance();