Thread: Just wondering

Hi is there any way that you could detect colours? i mean like say you had the mouse pointer over a red bit on screen, how you make it tell you wat colour it was? I was thinking the only way you could do this was by setting up a mouse hook, and a little widow that follows the pointer. that may sound a little strange but thats all i could come up with.

Thanks that worked perfectly.

I having a problem with putting that into a windows program it comes up with an error when i try to put it into a static box.

Error:

error C2664: 'SetDlgItemTextA' : cannot convert parameter 3 from 'unsigned long' to 'const char *'
Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast

k Ill Mave it to Windows

error C2664: 'SetDlgItemTextA' : cannot convert parameter 3 from 'unsigned long' to 'const char *'
Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast

An integer is not a string and requires conversion first. Use, for example wsprintf, sprintf for c (wsprintf is a cut-down, winapi sprintf unicode compatible function) or std::ostringstream for c++:

FAQ > How do I... (Level 1) > Convert an int to a string (char array) (C).

FAQ > How do I... (Level 1) > Convert an int to a string (C++).

Those tutorials are good but i have decided to make my program a console again...But i am having another problem, is there a way to make my program search the screen for a certain colour?

k i will experiment for a little thanks

k i have done a little experiment and come up with this but it dosnt work. please take a look at it.

Code:

#include "stdafx.h"

int main()
{

	HDC		hdcScrn;	// Handle on accessing screen parameters.
	HDC		hdc;
	hdcScrn	= CreateDC( "DISPLAY", 0, 0, 0 );
	hdc	= CreateDC( "DISPLAY", 0, 0, 0 );

	COLORREF Col;		// a Color type
	COLORREF Find;

	POINT Pos1, Pos2;	// cursor positions


	for (;;)
	{
		int x;
		int y;
		x++;
		y++;
		Find = GetPixel( hdc, x, y );	// sets the color variable to the cursor position.
		if (Find == 1976248)
		{
			cout<<"Found it";
			Sleep(5000);
		}
	}

	while ( true )
	{
		GetCursorPos( &Pos1 );	// get cursor position

		if ( (Pos1.x != Pos2.x) ||
			 (Pos1.y != Pos2.y) )	// sees if the cursor has moved
		{
			GetCursorPos( &Pos2 );

			Col = GetPixel( hdcScrn, Pos2.x, Pos2.y );	// sets the color variable to the cursor position. 
			
			cout<<"       \rThe color of Position ("<< Pos2.x << ',' << Pos2.y << "), is " << Col << "\t\t";
		}
	}



	DeleteDC( hdcScrn );	// deletes the handle

	return 0;
}

>>but it dosnt work<<

This is vague - help us to help you by describing explicitly what you think the problem is, including any compiler errors or warnings you may get.