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/* GetWindowsOnscreenHandle.c -- Minimal example of how to
* retrieve a GDI Window handle HWND for a specific Psychtoolbox
* onscreen window. This is M$-Windows only!
*
* This simple example expects the Psychtoolbox windowIndex for an
* open PTB onscreen window. It then retrieves a HWND GDI handle for
* that window by synthesizing the Windows caption string from the
* windowIndex winid, and using FindWindow() to find the window by name.
* on success, it calls HideWindow() to hide that window, just as a proof
* it actually works.
*
* Compile with: mex GetWindowsOnscreenHandle.c user32.dll
*
* Written by Mario Kleiner.
*/
#include <windows.h>
#include <stdlib.h>
#include "mex.h"
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray*prhs[])
{
HWND ptbwin;
char winName[100];
int winid = 10;
int show = 0;
if(nrhs<1) {
mexPrintf("No windowIndex provided, will default to 10.");
}
else winid = (int) mxGetScalar(prhs[0]);
sprintf(winName, "PTB Onscreen window [%i]:", winid);
ptbwin = FindWindow("PTB-OpenGL", winName);
if (ptbwin!=NULL) {
mexPrintf("SUCCESS for Window %i!\n", winid);
if(nrhs>1) show = (int) mxGetScalar(prhs[1]);
ShowWindow(ptbwin, (show) ? SW_SHOW : SW_HIDE);
}
else {
mexPrintf("FAILED!\n");
}
}
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