imaqGetLastKey
Usage
int imaqGetLastKey(char* keyPressed, int* windowNumber, int* modifiers);
Purpose
Returns the last key pressed in an active image window.
Parameters
|
Name
|
Type
|
Description
|
|---|---|---|
| keyPressed | char* | On return, keyPressed contains the last key pressed. The function sets keyPressed to -1 if there was no new key press to retrieve. Set this parameter to NULL if you do not need this information. |
| windowNumber | int* | On return, windowNum contains the window number of the window in which the key press was caught. The function sets windowNum to -1 if there was no new key press to retrieve. Set this parameter to NULL if you do not need this information. |
| modifiers | int* |
On return, modifiers contains a bit-shifted value indicating what modifiers, if any, the function applied to the key press. The following are possible modifiers: IMAQ_SHIFT IMAQ_ALT IMAQ_CTRL IMAQ_CAPS_LOCK Set this parameter to NULL if you do not need this information. |
Return Value
| Type |
Description |
|---|---|
| int | On success, this function returns a non-zero value. On failure, this function returns 0. To get extended error information, call imaqGetLastError(). |