For me it looks like you just want to draw simple objects.. (2d - graphics..) and for that you don't need opengl.. the good 'ole gdi would be enough for that.. there are some examples for drawing in gdi on this page.. another way would be to follow the scibble example of the msdn.. but if i did understand you wrong, sorry.. bernhard stolen sig#15: "The content of this post is not necessarily the opinion of my yadda yadda yadda."

1. Override OnLeftMouseDwn Store the position of the mouse when clicked, set a flag to tell that the left button is down, 2. Override OnMove Store the position of the actual position of the mouse, ask for redraw, (InvalidateRect(NULL,FALSE); 3. In OnDraw, check if left button is down, if so, draw a line from initial position to actual position, 4. Override OnLeftMouseUp, unset the flag. This is the basic idea, of course you can refine the concept. Jonathan de Halleux, Belgium.

The following is a complete program. Is it what you are asking for? If so, then there are many good books about the C and C++ languages that would cover such things much better than the volunteers helping with this forum. #include using namespace std; int main(int argc, char *argv[], char *envp[]) { int Array[3][10], i=0, i1, i2; for (i1=0; i1<3; ++i1) for (i2=0; i2<10; ++i2) Array[i1][i2] = i++; for (i1=0; i1<3; ++i1) { for (i2=0; i2<10; ++i2) cout << Array[i1][i2] << ' '; cout << endl; } return 0; }

int theUserInput; theUserInput = 10; // or from user input int *array; array = new int[theUserInput]; array[0] = 5; // whatever

Hi Steve, A standard procedure for this problem is to generate a sequence 1..n and pemutate these numbers randomly (n log n times should do the job). This is efficient if you want to access a certain number of items mutliple times. Wolfgang

Sam, thanks. I tried the link at www.stingray.com/mfc_faq but it seemed to be broken, I'm happy to find this again in the MSDN.

Assumptions: 1) The other dialog box is instantiated when the button is pressed. 2) Both dialogs are contained in the same process (application). 3) You are familiar enough with Visual C and MFC to make this work. /////////////////////////////////////////////////////// Put this in a header file used by both dialog box class CPP files: const int UWM_MYMESSAGE = WM_APP + 1; /////////////////////////////////////////////////////// Put this code in the dialog box that has the button in it (substitute your own identifiers for the ones I used): CMyDialog1::OnButtonPressed() { CString sTemp; GetDlgItem(IDC_MYEDITCONTROL)->GetWindowText(sTemp); PostMessage(UWM_MYMESSAGE, (WPARAM)((LPCSTR)sTemp), 0); } //////////////////////////////////////////////////////// Put this line in the header file second dialog box that will be displaying the text: afx_msg LRESULT OnMyMessage(WPARAM wParam, LPARAM lParam); You have to put this just before the line that reads: DECLARE_MESSAGE_MAP() /////////////////////////////////////////////////////// Put his line in the CPP file for the second dialog box class: ON_MESSAGE(UWM_MYMESSAGE, OnMyMessage) Again, put the previous line just before this one: END_MESSAGE_MAP() /////////////////////////////////////////////////////// Lastly, put a function in the CPP file for the second dialog box class that handles the message: void CMyDialog2::OnMyMessage(int nMsgType, CString sMsg) { // m_MyText is an edit control declared as a CString // value m_MyText = (LPCTSTR)wParam; UpdateData(FALSE); } ======================================================= The code above allows you to exchange data between windows/dialogs without having to setup a global variables (global var'ables are bad, mmmokay?).

Hi Steve, That should be pretty simple: CString filename; CFileDialog opendlg(TRUE, NULL, NULL, OFN_HIDEREADONLY, _T("Text files|*.txt;*.doc|Images|*.bmp;*.gif||")); if (opendlg.DoModal() == IDOK) filename = opendlg.GetPathName() This code works for a single selection dialog. At the end you have the complete name of the selected file in the filename variable. This should help you getting started, but refer to MSDN for a complete explanation. Cheers, Paolo.

I guess I should have mentioned my exmple (above) is for fetching the field/column names from an existing table in a MS Access database. Steve

I suggest to consult the book Inside Visual C++ by Kruglinsky. In this book the basics of ODBC an DAO acces is dealt with.

Hi Steve, This is not the best code I've ever wrote, but I hope it can help you. :-) Assuming that the first line is always the table name, you could do something like this: --struct.txt CustomerName CustID, INTEGER FirstName, STRING --code CStdioFile f; CString sLine, sSql; int nLine = 0; sSql = "CREATE TABLE "; f.Open("struct.txt", CFile::modeRead); while (f.ReadString(sLine)) { if (sLine.GetLength()) { if (++nLine == 1) { sSql += sLine+'('; } else { sLine.Replace(",", ""); sSql += sLine+','; } } } sSql.SetAt(sSql.GetLength()-1, ')'); f.Close(); AfxMessageBox(sSql); Regards, Wanderley

Hi, try this: CString BuildSQL( const CString& sStringFromFile ) { CString sSQL, sTemp1, sTemp2; sSQL = \_T("CREATE TABLE "); // string at position 0 is the table name if( AfxExtractSubString( sTemp1, sStringFromFile, 0, ',' ) ) { sSQL += sTemp1; sSQL += "( "; // now add the column names and the column types for( int i = 1; ; i +=2 ) { if( AfxExtractSubString( sTemp1, sStringFromFile, i, ',' ) && AfxExtractSubString( sTemp2, sStringFromFile, i + 1, ',' ) ) { sSQL += sTemp1; sSQL += sTemp2; sSQL += \_T(", "); } else { break; } } // remove the last ", " sSQL.ReleaseBuffer( sSQL.GetLength() - 2 ); sSQL += \_T(" )"); } return sSQL; } Regards Holger Persch