Window corner actions

typedef enum _PRL_CORNER_ACTIONS {
  PCA_NO_ACTION = 0,
  PCA_WINDOWED = 1,
  PCA_COHERENCE = 2,
  PCA_SEAMLESS = 3,
  PCA_MODALITY = 4,
  PCA_HIDE_APPLICATION = 5,
  PCA_UNGRAB_INPUT = 6,
  PCA_CRYSTAL = 7
} PRL_CORNER_ACTIONS;