Wow I am confused. SendMessage API.

[BillBoeBaggins]

Okie doke, I am so darn confused as to why this piece of code is causing a segmentation fault.

char MyMsg[]="This is a message.\0";
char * pMyMsg=&MyMsg[0];
SendMessage(hwnd_MyListBox,LB_ADDSTRING,0,*pMyMsg);

The MSDN says that the LPARAM is supposed to be a pointer.

However when I use it without Dereferencing it

SendMessage(hwnd_MyListBox,LB_ADDSTRING,0,pMyMsg);

It tells me that it is expecting a long int.

It will compile the first way but then causes the fault.


Thanks for all help past/present/future.

[iwabee]

Okie doke, I am so darn confused as to why this piece of code is causing a segmentation fault.

char MyMsg[]="This is a message.\0";
char * pMyMsg=&MyMsg[0];
SendMessage(hwnd_MyListBox,LB_ADDSTRING,0,*pMyMsg);

It's:

static char MyMsg[]="This is a message.\0";
char * pMyMsg=&MyMsg[0];
SendMessage(hwnd_MyListBox,LB_ADDSTRING,0,(LPARAM)pMyMsg);

and you don't need pMyMsg, you can use MyMsg without any problems
edit: and I don't see any reason to put '\0' at the end.

[BillBoeBaggins]

Thank you much for your input, but per my first post the program won't compile and tells me it can't convert a "'char*' to a 'long int'". Which is weird as well because if dereferencing the pointer causes the procedure to get a character array why should it compile. I am still a bit boggled.

[BillBoeBaggins]

Okie doke, I noticed your Edits, and that is what cured the problem "(LPARAM)", I tacked that in and it works fine and dandy.

Thank you!!!