23 Solved Topics
Remove Filter  | How can I cause the Paint event to fire from a Form_Click() event? This is what I'm trying to do... [CODE] Public Class StrTests01 Private Sub StrTests01_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Click Dim ps As Graphics = Me.CreateGraphics() 'RaiseEvent StrTests01_Paint(sender, ps) End Sub Private Sub StrTests01_Paint(ByVal … |
| | This is my first post! I can’t figure out how to modify/cast the return address obtained from the Windows Api function GetProcAddress() without using a typedef. I’m aware that using a typedef is the standard way to do this, but one should be able to do it without a typedef, … |
| | I'm doing command line compiling, and thought there might be some switch that would list starting and finishing time, but couldn't find anything. I'm using Windows, and trying to work with the default gcc/g++ from mingw installed with Code::Blocks. Or is there some way of doing this with some shell … |
| | What is the difference between size_t and size_type? size_type seems to be related closely with the C++ Standard String Class. Couldn't they have just used size_t instead? I don't understand the difference. Could anyone elaborate please? |
| | I'm a coder that doesn't know much about hardware, but I have a question that's been bugging me for a long, long time. If I took a pretty new and fast machine (and I'm mostly interested in laptops) such as a recent XP or Win 7 and tried to put … |
| | Hello Vivayan! Its taken me this long to understand your sophisticated program you gave me using STL (Standard Template Library) iterators, container classes, algorithms, and the works! I’m truly grateful for the time you took to develop this program for me, and it inspired me so much I’ve decided to … |
| | Is there a way to pre-specify a specific string buffer size for the underlying buffer to which repeated concatenations are going to be made in a loop with the purpose of eliminating time wasting re-allocations and block movements of characters from one buffer to another? I have tried the string::reserve() … |
| | I musn't be thinking about something right (or maybe left)! If I have the number '1', which in binary is this... 1000 0000 ...and I do a right shift on it to get this... 0100 0000 then that should give me '2', not??? Then why doesn't this work... [CODE=C++] #include …  |
| | For the past 12 years I've lived in mortal, cowering, abject fear of one particular feature of the Visual Studio 6 C/C++ IDE, and that is the 'Find' feature on the 'Edit' menu where you can fill in the textbox to find a symbol in your file, and then click … |
| | My title says it all! I'm completely mystified by this - have been working at it all day with no resolution. The fundamental assumption under which I am laboring is that when a Dll is loaded into a host's process, the Dll will receive a DLL_PROCESS_ATTACH message. I have been … |
| | [CODE=C++] #include <stdio.h> int main() { int iBAF=10; int iPlots=14; double dblFactor; dblFactor=iBAF/iPlots; //to get a floating point you need a cast! printf("dblFactor = %10.6f\n",dblFactor); return 0; } /* dblFactor = 0.000000 */ [/CODE] I thought C/C++ would offer a few benifits beyond pure assembler. Apparently I was wrong. |
| | Been studying what I thought was a fairly authoritative article about BSTRs by Bruce McKinney... [url]http://www.ecs.syr.edu/faculty/fawcett/handouts/cse775/Presentations/BruceMcKinneyPapers/COMstrings.htm[/url] where he states that the four bytes before the start of the BSTR contains the string's length. Here is the exact quote... [QUOTE] What Is a BSTR? The BSTR type is actually a typedef, … |
| | This is one mean function! I've tried everything I can think of. I registered a type library with LoadTypeLibEx() which is a really easy function to use. I mistakingly thought UnregisterTypeLib() would be routine. Its most decidedly not! The error I keep getting with FormatMessage() is... Error accessing the OLE … |
| | Recently I've been looking into BSTRs, and have found how 'touchy' they can be. I saw this in a COM class in the class destructor regarding a m_strBStr member... [CODE] if(m_strBStr) SysFreeString(m_strBStr); [/CODE] When I saw it I thought, "How would the BSTR have a zero assigned to it?", because … |
| | Does anyone know if there are any issues in using the basic ODBC Api for database access on 64 bit Windows Vista/7 systems? This has been my preferred database access technology for a long time, and I'd prefer not moving to ADO or something else if I don't have to. … |
| | [CODE=C++] /* I'm stuck! Here is what I consider to be a perfectly running program that uses an array ( TArray ) template to hold arrays of objects. Its just about your classic text book example. Its pretty well stripped down to nothing to illustrate my problem. I simply don't … |
| | Been meaning to ask that question for a long time. With Visual Studio 6 I seem to recall I had to include iostream.h to use the CString class. Do I have that right? I think I also had to specify in a configuration dialog that I wanted to either link … |
| | I have a general question about threads prompted by something strange I'm seeing in an application I developed involving ODBC access to Microsoft Access and SQL Server databases. Let me present the context of the problem first. I have been developing some tutorials on ODBC database access in two different … |
| | Only have Visual Studio 2008 about a week but just ran into something inexplicable to me. This include file (and others like it)... [CODE=C++] //DoTestData.h #ifndef DOTESTDATA_H #define DOTESTDATA_H unsigned int iCreateDB(TCHAR*); unsigned int blnMakeTable(SQL&); int GetRecordCount(SQL&, unsigned int&); unsigned int blnInsert(SQL&, TCHAR**, unsigned int&, HWND, int); unsigned int blnDumpData(SQL&, … |
| | I can't figure out for the life of me how to import a class declared, defined and implemented within a dll into a host app using any GNU build systems. The two compiler suites I have are Dev C++ and the newer Code::Blocks. I have no problem with this using … |
| | Have you ever had a problem where you are completely dumbfounded? Staring at the output of a program and saying this is impossible? Sort of like… int a =5; printf(“a=%d\n”,a); Output: A=6 Well, I’d appreciate if someone would take a look at this simple program below which creates a class …  |
| | I’m trying to learn how to use C++ templates, and I thought I was grasping it all ok until I decided to try to pass a template defined object variable as a function parameter. Having all kinds of troubles with that. I’m using a typical example of a parameterizd array … |
| | Just decided to try the new Code::Blocks IDE on an old ODBC program of mine that I had always compiled as a C program. I decided to redo it as a C++ program and immediately hit a nasty problem that I never ran into in C. It involves a Typedef … |
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