Dev C++ LPPOINT

[Senith]

ok so I have this part of the code in my code:

LPPOINT Pos;
GetCursorPos(Pos);

its a program my friend wants me to make.

Well everytime I try to use Pos.y or Pos.y.value the idw it keeps coming back saying y hasn't been declared,why is that?


This makes no sense to me *clueless*

thanks

[MrViggy]

In the Windows SDK, 'LPPOINT' is a pointer to a POINT struct. So:

POINT Pos;
GetCursorPos(&Pos);

should work.

Viggy

[Senith]

In the Windows SDK, 'LPPOINT' is a pointer to a POINT struct. So:

POINT Pos;
GetCursorPos(&Pos);

should work.

Viggy

Nah that didn't work. It just said something about can't convert tag point




#include <cstdlib>
#include <windows.h>
#include <iostream>
#include <fstream>
using namespace std;
ofstream file("c:\\mouse.txt");
int main(void)
{
LPPOINT Pos;
GetCursorPos(&Pos);
cout << Pos.y<<endl;
while(Pos=0){

}
file<<"hello world";
system("PAUSE");
return (0);
}


Errors:

10 C:\Master Backup\g backup\Projects\Event Tasker\main.cpp cannot convert `tagPOINT**' to `tagPOINT*' for argument `1' to `BOOL GetCursorPos(tagPOINT*)'

11 C:\Master Backup\g backup\Projects\Event Tasker\main.cpp `y' has not been declared

11 C:\Master Backup\g backup\Projects\Event Tasker\main.cpp request for member of non-aggregate type before '<<' token

[Russco]

You are still making the same mistake pointed out by MrViggy. Use POINT not LPPOINT.

[Senith]

ok I'll try point again, maybe it will work. I tried it before and it said POINT doesn't name a type

[Chris_F]

ok I'll try point again, maybe it will work. I tried it before and it said POINT doesn't name a type

That because there is NO type "POINT" in windows.h

Tip: if you're using Visual Studio, hold your mouse over the text LPPOINT and it will bring a box out that states that LPVOID is a typedef for a pointer to a struct named tagPOINT. LP is Hungarian notation for long pointer which means it only points to a tagPOINT.

tagePOINT pos; // or LPPOINT pos = new tagPOINT;
GetCursorPos(&Pos); // or GetCursorPos(Pos);
cout << Pos.y;

[Russco]

MSDN disagrees.

The struct is typedeffed to POINT.