CODE:

int pos_size_combo0[1][4];
string text_combo0[1][1];
int strok_combo0[1];
int flag_combo0[1];

pos_size_combo0[0][0]=105; pos_size_combo0[0][1]=70; pos_size_combo0[0][2]=100; pos_size_combo0[0][3]=80;
strok_combo0[0]=1;
text_combo0[0][0]="Список 0";
flag_combo0[0]=0;

//////////

createdialog(0, COMBO, #pos_size_combo0[0][0], #text_combo0[0][0], #strok_combo0[0], #flag_combo0[0]);
//////////

showdialog(0, "Диалог", 835, 390, 250, 300, 3, 1);
//////////

loop() sleep(10);//Убрать после теста

При нажатии на COMBO диалог прячется