This example first queries the count of colors used by a push button. Then it queries all the colors used by push buttons in the application.

/******************************************************************/
/* Query the number of colors used by a push button.              */
/******************************************************************/

cCount = WinQueryControlColors(
              HWND_DESKTOP,             /* Desktop window handle  */
              CCT_PUSHBUTTON,           /* Select push button     */
              CCF_COUNTCOLORS,          /* Count number of colors */
              0, 0);

pactlColor = (PCTLCOLOR)malloc(sizeof(CTLCOLOR) * cCount);

/******************************************************************/
/* Query all the colors used by push buttons in application.      */
/******************************************************************/

WinQueryControlColors(HWND_DESKTOP,     /* Desktop window handle  */
              CCT_PUSHBUTTON,           /* Select push button     */
              CCF_ALLCOLORS |           /* Return all colors ...  */
              CCF_APPLICATION,          /* ... for application    */
              cCount,                   /* Size of array          */
              pactlColor);              /* Buffer for color data  */