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DllImport problem
Hi, I'm using p/invoke to call a couple of BLAS routines, and the strangest thing is happening. Yesterday I wrote the code to call an unmanaged function called dgemm, using a dll I downloaded from the web. [DllImport("blas_win32.dll")] //[DllImport("libacml.dll")] unsafe private static...- sbayeta
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- Replies: 1
- Forum: C# (C sharp): Microsoft
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DrawImage()
Hi, I'm using the Graphics.DrawImage() method to draw a picture. When I use a ScaleTransform to zoom in, the image is "smoothed" and it's not possible to see the individual pixels. This is not good for what I'm trying to do, and I already tried setting g.InterpolationMode =...- sbayeta
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- Replies: 0
- Forum: C# (C sharp): Microsoft
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Choosing a primary key
Hi, I have a table with a field called 'lote' containing unique values like TM07082004 TT07082004 TN07082004 TM08082004 TT08082004 I'd like to know whether I should use this field as primary key for my table, or create an autonumeric field and use that instead. What are the... -
WIN32 API wrapper classes
Hi, I wrote a little set of WIN32 API wrapper C++ classes, just as a way to learn the API and to maintain my code organized. My Window class is supposed to be used like this: #include <windows.h> #include "wrappers.h" Window *wn; ProcedureBag *pb; Button *bt; void on_create(WPARAM...- sbayeta
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- Replies: 3
- Forum: Microsoft: Visual C++
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Time intervals
Hi, What's the right way to store time intervals in a table ? I have a field that stores the start time of a user session , and a second field to store the session duration. The duration field isn't a date, but a time interval, so I was thinking maybe it's a better idea to store it as an int... -
Static keyword and const keyword.
Hi, I'm finishing reading The C programming language K&R. I've been programming embedded systems using C for more than a year now. Anyway, I still have some doubts about some stuff. Here goes a couple of questions: 1 - What is the effect of declaring a function to be static ? 2 - What's the... -
Struct question
I have a struct in my program with several fields in it. I'd like to know if those fields are guaranteed to be in the order I declared them if I read the struct using an unsigned char *ptr: struct datastruct { int i; long l; float f; char c[4]; } mydata; I'll be wirting this data with a... -
CREATE TABLE newtable SELECT ... FROM oldtable ?
Hi, I have a table with 3 DOUBLE fields: "x", "y" and "f". From this table I'm creating a new one using the query "CREATE TABLE new TABLE SELECT ROUND((x-21.45)/5) AS newx, ROUND((y-18.15)/5) AS newy, f AS newf FROM oldtable;" This creates a new table... -
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Will PERL do what I need ?
Hi, I'm a newbie on web apps, though I have some degree of experience in programming C/C++ I need to build a page to show some values stored in a database. As these stored values are updated by other apps, I need my page to show the changes in real time. Can I do this using Perl ? If not, can... -
Real time readings
Hi, I'm builduing a php page and I want some boolean values in my DB to be shown in real time. For example, I have four bool values like val1 true val2 true val3 false val4 true and I'd like to show this values in my web page in real time. If one of these values changes, I...
