That should do the trick! But how do I add the Leave event to all controls? Do I have to loop through all controls and add it one by one, or is is possible to add an event to a collection? (Doesn't seem to be possible with ControlsCollection) Thanks! /Henrik

Hi all, I wonder if there is some way to find out which control had input focus previously to an other... I.e. from a btn_Click(...) event handler, I want to know which control had focus before the user clicked the button. Thanks in advance, /Henrik J.

This function does not compile in C# (bad parameter in recursive call), and as far as I can see it doesn't do anything useful (it always return false). If you fix that, I might be able to help you.

Thank you for your reply! There is no need to create an instance, since the methods are declared static. I'm sure GetLiveList() is declared dllexport in the dll. The C++ code was a header file used when importing the dll into C++ code, which I have used as a model for my C# interface. The problem turned out to be the difference of the long data type between C++ and C#: C++ long is 4 bytes whereas C# long is 8 bytes and C# int is 4 bytes. So the solution was to replace all occurences of long in the interface with int. :) Regards, /Henrik

Hi, I am trying to create a C# interface for a dll with functions. The C++ interface for one of the functions looks like this: __declspec(dllimport) long _cdecl GetLiveList( long, long*, long*, long[]*, long); I declared my C# equivalent as: public class Ismbus32 { //... [DllImport("ismbus32.dll", CharSet=CharSet.Auto, CallingConvention=CallingConvention.Cdecl)] private static extern long GetLiveList( long, ref long, ref long, ref long[], long); } When I try to call the function, using the code below, I get a NullPointerException and the message "Object reference not set to an instance of an object." public class Form1 : System.Windows.Forms.Form { //... private void btn_Click(object sender, System.EventArgs e) { long in = 2; long out1 = 0; long out2 = 0; long[] items = new long[635]; long itemsMax = 634; long lRes = Ismbus32._CDDLG_GetLiveList(in, ref out1, ref out2, ref items, itemsMax); } } Does anyone have a clue?! Thanks in advance, /Henrik Johansson

What is wrong with (.h) Member* get_member(Book* book); (.cpp) template<class Book,class Member> Member* AssociationList::get_member(Book* book) { ... } ?

strcat() example from MSDN: /* STRCPY.C: This program uses strcpy * and strcat to build a phrase. */ #include #include void main( void ) { char string[80]; strcpy( string, "Hello world from " ); strcat( string, "strcpy " ); strcat( string, "and " ); strcat( string, "strcat!" ); printf( "String = %s\n", string ); } Output: String = Hello world from strcpy and strcat!

The folder information is stored in the project's .opt file, so you'll need to protect if from beeing removed or overwritten. Or, if you're using a version control system, you could have it checked in, checking it out when you make changes to the class tree... I don't know why they disappear, but it's bothering me as well.

This is one way of doing it... struct BinaryFunction { double (*eval)(double, double); char* sign; }; double add(double a, double b) { return (a+b); } double subtract(double a, double b) { return (a-b); } int main(int argc, char* argv[]) { BinaryFunction** ppBFunctionList = new BinaryFunction*[2]; char addSign[] = " + "; BinaryFunction Add = { &add, addSign }; ppBFunctionList[0] = &Add; char subSign[] = " - "; BinaryFunction Sub = { &subtract, subSign }; ppBFunctionList[1] = ⋐ for (int i = 0; i < 2; i++) { double dRes = (*ppBFunctionList[i]->eval)(3, 2); printf("%.2f\n", dRes); } return 0; } Regards, /Henrik J

Yes. If you don't want to wait for enter, you should read one character at a time, e.g. getchar(). Example from MSDN: /* GETC.C: This program uses getchar to read a single line * of input from stdin, places this input in buffer, then * terminates the string before printing it to the screen. */ #include void main( void ) { char buffer[81]; int i, ch; printf( "Enter a line: " ); /* Read in single line from "stdin": */ for( i = 0; (i < 80) && ((ch = getchar()) != EOF) && (ch != '\n'); i++ ) buffer[i] = (char)ch; /* Terminate string with null character: */ buffer[i] = '\0'; printf( "%s\n", buffer ); }

Does it have to be scanf()? Otherwise you could gets(), which terminates at Ctrl+Z: int i = 0; char a[10][10]; while (gets(a[i]) != NULL) { i++; }

Hi all, I have a question regarding DevStudio add-ins: Is it possible to enable/disable, or even change, buttons in an add-in command bar? If it is - how? Thanks, /Henrik

I guess you could use a hash table of some kind, but I don't have any good samples on that now. You could also try using a std::map. There is a sample in MSDN if you look at map::find().

From the top of my head there are a couple of ways to do it: - SQLDriverConnect() in the ODBC API - CDatabase::Open() / OpenEx() It is probably possible to get it from other database APIs as well... Hope it helps!

Does anyone know how to clear all text from the macro tab in the Output Window from a DevStudio Add-in?